diff --git a/...yer/Categories/MainCategories.Designer.cs → ...yer/Categories/MainCategories.Designer.cs b/...yer/Categories/MainCategories.Designer.cs → ...yer/Categories/MainCategories.Designer.cs
diff --git a/...ntatin Layer/Categories/MainCategories.cs → ...tation Layer/Categories/MainCategories.cs b/...ntatin Layer/Categories/MainCategories.cs → ...tation Layer/Categories/MainCategories.cs
@@ -117,6 +117,71 @@ private void btnDeleteCategories_Click(object sender, EventArgs e)
             }
         }
 
-
+        private void btnUpdateCategories_Click(object sender, EventArgs e)
+        {
+            if (dgvCategories.SelectedRows.Count > 0)
+            {
+                DataGridViewRow selectedRow = dgvCategories.SelectedRows[0]; //Selecting the row
+                var updateCustomer = (_Category)selectedRow.DataBoundItem; //setting deleteCategory to an instance of the Category Class of the selected row.
+
+                frmUpdateCategory categoryUpdate = new frmUpdateCategory(updateCustomer);
+                categoryUpdate.ShowDialog();
+                DisplayCategories();
+            }
+        }
+
+        private void btnSearchCategories_Click(object sender, EventArgs e)
+        {
+            List<_Category> catList = new List<_Category>();
+            try
+            {
+                // Automatically  open and close the connection
+                using (var conn = ConnectionManager.DatabaseConnection())
+                {
+                    using (var cmd = conn.CreateCommand())
+                    {
+                        if (rbShowAll.Checked)
+                        {
+                            cmd.CommandText = "SELECT * FROM Categories";
+                        }
+                        if (rbSearchCategoryID.Checked)
+                        {
+                            cmd.CommandText = "SELECT * FROM Categories WHERE CategoryID = @categoryid";
+                        }
+                        if (rbSearchCategory.Checked)
+                        {
+                            cmd.CommandText = "SELECT * FROM Categories WHERE Category = @category";
+                        }
+
+                        cmd.Parameters.AddWithValue("categoryid", txtSearchCategoryID.Text);
+                        cmd.Parameters.AddWithValue("category", txtSearchCategory.Text);
+
+                        cmd.Transaction = conn.BeginTransaction();
+                        cmd.ExecuteNonQuery();
+                        cmd.Transaction.Commit();
+                        using (var rdr = cmd.ExecuteReader())
+                        {
+                            while (rdr.Read())
+                            {
+                                //Define the list items
+                                var category = new _Category(
+                                int.Parse(rdr["CategoryID"].ToString()),
+                                rdr["Category"].ToString());
+
+                                catList.Add(category);
+                            }
+                            dgvCategories.DataSource = catList;
+                        }
+                    }
+
+                }
+
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show("Unsuccessful" + ex);
+            }
+
+        }
     }
 }
diff --git a/...atin Layer/Categories/MainCategories.resx → ...tion Layer/Categories/MainCategories.resx b/...atin Layer/Categories/MainCategories.resx → ...tion Layer/Categories/MainCategories.resx
diff --git a/Acme Project/Acme Project/Presentation Layer/Categories/UpdateCategory.Designer.cs b/Acme Project/Acme Project/Presentation Layer/Categories/UpdateCategory.Designer.cs
diff --git a/Acme Project/Acme Project/Presentation Layer/Categories/UpdateCategory.cs b/Acme Project/Acme Project/Presentation Layer/Categories/UpdateCategory.cs
@@ -0,0 +1,62 @@
+using Acme_Project.Business_Logic_Layer;
+using Acme_Project.Data_Access_Layer;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Data.SqlClient;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Acme_Project.Categories
+{
+    public partial class frmUpdateCategory : Form
+    {
+        public frmUpdateCategory(_Category updateCategory)
+        {
+            InitializeComponent();
+            //Fill in the form
+            txtCategoryID.Text = updateCategory.CategoryID.ToString();
+            txtCategory.Text = updateCategory.Category;
+        }
+
+        private void btnUpdateCategories_Click(object sender, EventArgs e)
+        {
+            if (validateInput())
+            {
+                //Create an object of the Category class.
+                var updateExistingCategory = new _Category(int.Parse(txtCategoryID.Text),
+                    txtCategory.Text);
+
+                using (var conn = ConnectionManager.DatabaseConnection())
+                {
+                    //Specify the Stored Procedure
+                    using (var cmd = new SqlCommand("sp_Categories_UpdateCategory", conn))
+                    {
+                        cmd.CommandType = CommandType.StoredProcedure;
+                        cmd.Parameters.AddWithValue("CategoryID", updateExistingCategory.CategoryID);
+                        cmd.Parameters.AddWithValue("Category", updateExistingCategory.Category);
+
+                        cmd.Transaction = conn.BeginTransaction();
+                        cmd.ExecuteNonQuery();
+                        cmd.Transaction.Commit();
+                    }
+                }
+                this.Close();
+            }
+        }
+
+        private bool validateInput()
+        {
+            if (String.IsNullOrEmpty(txtCategory.Text))
+            {
+                MessageBox.Show("Please enter the Category Name.");
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/...atin Layer/Categories/UpdateCategory.resx → ...tion Layer/Categories/UpdateCategory.resx b/...atin Layer/Categories/UpdateCategory.resx → ...tion Layer/Categories/UpdateCategory.resx
diff --git a/... Layer/Customers/AddCustomers.Designer.cs → ... Layer/Customers/AddCustomers.Designer.cs b/... Layer/Customers/AddCustomers.Designer.cs → ... Layer/Customers/AddCustomers.Designer.cs
diff --git a/...esentatin Layer/Customers/AddCustomers.cs → ...sentation Layer/Customers/AddCustomers.cs b/...esentatin Layer/Customers/AddCustomers.cs → ...sentation Layer/Customers/AddCustomers.cs
diff --git a/...entatin Layer/Customers/AddCustomers.resx → ...ntation Layer/Customers/AddCustomers.resx b/...entatin Layer/Customers/AddCustomers.resx → ...ntation Layer/Customers/AddCustomers.resx
diff --git a/...Layer/Customers/MainCustomers.Designer.cs → ...Layer/Customers/MainCustomers.Designer.cs b/...Layer/Customers/MainCustomers.Designer.cs → ...Layer/Customers/MainCustomers.Designer.cs
diff --git a/...sentatin Layer/Customers/MainCustomers.cs → ...entation Layer/Customers/MainCustomers.cs b/...sentatin Layer/Customers/MainCustomers.cs → ...entation Layer/Customers/MainCustomers.cs
@@ -196,10 +196,7 @@ private void btnDeleteCustomers_Click(object sender, EventArgs e)
 
                         DisplayCustomers(); //Refresh the table
                     }
-
                 }
-
-
             }
             else
             {

diff --git a/...ntatin Layer/Customers/MainCustomers.resx → ...tation Layer/Customers/MainCustomers.resx b/...ntatin Layer/Customers/MainCustomers.resx → ...tation Layer/Customers/MainCustomers.resx
diff --git a/...atin Layer/Customers/SearchCustomers.resx → ...tion Layer/Customers/SearchCustomers.resx b/...atin Layer/Customers/SearchCustomers.resx → ...tion Layer/Customers/SearchCustomers.resx
diff --git a/...yer/Customers/UpdateCustomers.Designer.cs → ...yer/Customers/UpdateCustomers.Designer.cs b/...yer/Customers/UpdateCustomers.Designer.cs → ...yer/Customers/UpdateCustomers.Designer.cs
diff --git a/...ntatin Layer/Customers/UpdateCustomers.cs → ...tation Layer/Customers/UpdateCustomers.cs b/...ntatin Layer/Customers/UpdateCustomers.cs → ...tation Layer/Customers/UpdateCustomers.cs
diff --git a/...atin Layer/Customers/UpdateCustomers.resx → ...tion Layer/Customers/UpdateCustomers.resx b/...atin Layer/Customers/UpdateCustomers.resx → ...tion Layer/Customers/UpdateCustomers.resx
diff --git a/...Layer/Maintenance/Maintenance.Designer.cs → ...Layer/Maintenance/Maintenance.Designer.cs b/...Layer/Maintenance/Maintenance.Designer.cs → ...Layer/Maintenance/Maintenance.Designer.cs
diff --git a/...sentatin Layer/Maintenance/Maintenance.cs → ...entation Layer/Maintenance/Maintenance.cs b/...sentatin Layer/Maintenance/Maintenance.cs → ...entation Layer/Maintenance/Maintenance.cs
@@ -13,6 +13,7 @@
 using Acme_Project.Categories;
 using Acme_Project.Presentatin_Layer.Products;
 using Acme_Project.Presentatin_Layer.Sales;
+using Acme_Project.Presentation_Layer.ProductTypes;
 
 namespace Acme_Project.Presentatin_Layer
 {
@@ -46,5 +47,11 @@ private void btnCategories_Click(object sender, EventArgs e)
             frmMainCategories mainCategories = new frmMainCategories();
             mainCategories.ShowDialog();
         }
+
+        private void btnProductTypes_Click(object sender, EventArgs e)
+        {
+            frmMainProductTypes mainProductTypes = new frmMainProductTypes();
+            mainProductTypes.ShowDialog();
+        }
     }
 }
diff --git a/...ntatin Layer/Maintenance/Maintenance.resx → ...tation Layer/Maintenance/Maintenance.resx b/...ntatin Layer/Maintenance/Maintenance.resx → ...tation Layer/Maintenance/Maintenance.resx
diff --git a/Acme Project/Acme Project/Presentation Layer/ProductTypes/AddProductTypes.Designer.cs b/Acme Project/Acme Project/Presentation Layer/ProductTypes/AddProductTypes.Designer.cs
diff --git a/Acme Project/Acme Project/Presentation Layer/ProductTypes/AddProductTypes.cs b/Acme Project/Acme Project/Presentation Layer/ProductTypes/AddProductTypes.cs
@@ -0,0 +1,66 @@
+using Acme_Project.Business_Logic_Layer;
+using Acme_Project.Data_Access_Layer;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Data.SqlClient;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Acme_Project.Presentation_Layer.ProductTypes
+{
+    public partial class frmAddProductTypes : Form
+    {
+        public frmAddProductTypes()
+        {
+            InitializeComponent();
+        }
+
+        private bool validateInput()
+        {
+            if (String.IsNullOrEmpty(txtProductType.Text))
+            {
+                MessageBox.Show("Please enter the Product Type.");
+                return false;
+            }
+            return true;
+        }
+
+        private void btnAddProductTypes_Click(object sender, EventArgs e)
+        {
+            if (validateInput())
+            {
+                //Create the sale object using the Sale Class constructor
+                var productType = new _ProductType();
+
+                using (var conn = ConnectionManager.DatabaseConnection())
+                using (var cmd = new SqlCommand("sp_ProductTypes_CreateProductType", conn))
+                {
+                    cmd.CommandType = CommandType.StoredProcedure;
+
+                    SqlParameter nptid = cmd.Parameters.Add("NewProductTypeID", SqlDbType.Int); nptid.Direction = ParameterDirection.Output;
+                    cmd.Parameters.AddWithValue("ProductType", txtProductType.Text);
+
+                    cmd.Transaction = conn.BeginTransaction();
+                    cmd.ExecuteNonQuery();
+                    cmd.Transaction.Commit();
+
+                }
+                if (MessageBox.Show("Would you like to add another Product Type into the database", "Add another?",
+                    MessageBoxButtons.YesNo) == DialogResult.Yes)
+                {
+                    txtProductType.Clear();
+                    txtProductTypeID.Clear();
+                }
+                else
+                {
+                    this.Close();
+                }
+            }
+        }
+    }
+}
diff --git a/...resentatin Layer/Products/AddProduct.resx → ...n Layer/ProductTypes/AddProductTypes.resx b/...resentatin Layer/Products/AddProduct.resx → ...n Layer/ProductTypes/AddProductTypes.resx
diff --git a/Acme Project/Acme Project/Presentation Layer/ProductTypes/MainProductTypes.Designer.cs b/Acme Project/Acme Project/Presentation Layer/ProductTypes/MainProductTypes.Designer.cs
diff --git a/Acme Project/Acme Project/Presentation Layer/ProductTypes/MainProductTypes.cs b/Acme Project/Acme Project/Presentation Layer/ProductTypes/MainProductTypes.cs
@@ -0,0 +1,186 @@
+using Acme_Project.Business_Logic_Layer;
+using Acme_Project.Data_Access_Layer;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Data.SqlClient;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Acme_Project.Presentation_Layer.ProductTypes
+{
+    public partial class frmMainProductTypes : Form
+    {
+        public frmMainProductTypes()
+        {
+            InitializeComponent();
+        }
+
+        private void DisplayProductTypes()
+        {
+            string selectQuery;
+            selectQuery = "SELECT * FROM ProductTypes";
+            List<_ProductType> ptList = new List<_ProductType>();
+            try
+            {
+                // Automatically  open and close the connection
+                using (var conn = ConnectionManager.DatabaseConnection())
+                using (var cmd = new SqlCommand(selectQuery, conn))
+                using (var rdr = cmd.ExecuteReader())
+                {
+                    while (rdr.Read())
+                    {
+                        //Define the list items
+                        var productType = new _ProductType(
+                            int.Parse(rdr["ProductTypeID"].ToString()),
+                            rdr["ProductType"].ToString());
+
+                        ptList.Add(productType);
+                    }
+                    dgvProductType.DataSource = ptList;
+                }
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show("Unsuccessful" + ex);
+            }
+
+        }
+
+        private void btnAddProductType_Click(object sender, EventArgs e)
+        {
+            frmAddProductTypes addProductTypes = new frmAddProductTypes();
+            addProductTypes.ShowDialog();
+            DisplayProductTypes();
+        }
+
+        private void btnUpdateProductType_Click(object sender, EventArgs e)
+        {
+            if (dgvProductType.SelectedRows.Count > 0)
+            {
+                DataGridViewRow selectedRow = dgvProductType.SelectedRows[0]; //Selecting the row
+                var productType = (_ProductType)selectedRow.DataBoundItem; //setting Product Type to an instance of the Product Type Class of the selected row.
+
+                frmUpdateProductTypes productTypeUpdate = new frmUpdateProductTypes(productType);
+                productTypeUpdate.ShowDialog();
+                DisplayProductTypes();
+            }
+        }
+
+        private void btnSearchProductType_Click(object sender, EventArgs e)
+        {
+            List<_ProductType> ptList = new List<_ProductType>();
+            try
+            {
+                // Automatically  open and close the connection
+                using (var conn = ConnectionManager.DatabaseConnection())
+                {
+                    using (var cmd = conn.CreateCommand())
+                    {
+                        if (rbShowAll.Checked)
+                        {
+                            cmd.CommandText = "SELECT * FROM ProductTypes";
+                        }
+                        if (rbSearchProductTypeID.Checked)
+                        {
+                            cmd.CommandText = "SELECT * FROM ProductTypes WHERE ProductTypeID = @producttypeid";
+                        }
+                        if (rbSearchProductType.Checked)
+                        {
+                            cmd.CommandText = "SELECT * FROM ProductTypes WHERE ProductType = @producttype";
+                        }
+
+                        cmd.Parameters.AddWithValue("producttypeid", txtSearchProductTypeID.Text);
+                        cmd.Parameters.AddWithValue("producttype", txtSearchProductType.Text);
+
+                        cmd.Transaction = conn.BeginTransaction();
+                        cmd.ExecuteNonQuery();
+                        cmd.Transaction.Commit();
+                        using (var rdr = cmd.ExecuteReader())
+                        {
+                            while (rdr.Read())
+                            {
+                                //Define the list items
+                                var producttype = new _ProductType(
+                                int.Parse(rdr["ProductTypeID"].ToString()),
+                                rdr["ProductType"].ToString());
+
+                                ptList.Add(producttype);
+                            }
+                            dgvProductType.DataSource = ptList;
+                        }
+                    }
+
+                }
+
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show("Unsuccessful" + ex);
+            }
+
+        }
+
+        private void frmMainProductTypes_Load(object sender, EventArgs e)
+        {
+            DisplayProductTypes();
+        }
+
+        private void btnDeleteProductType_Click(object sender, EventArgs e)
+        {
+            if (dgvProductType.SelectedRows.Count > 0)
+            {
+                DialogResult dialogResult = MessageBox.Show("Are you sure you wish to delete this Product Type?", "Product Type Delete", MessageBoxButtons.YesNo);
+                if (dialogResult == DialogResult.No)
+                {
+                    return;
+                }
+                DataGridViewRow selectedRow = dgvProductType.SelectedRows[0]; //Selecting the row
+                var deleteProductType = (_ProductType)selectedRow.DataBoundItem; //setting deleteProductType to an instance of the Product Type Class of the selected row.
+
+                //Test to see if the Product Type can be deleted
+
+
+                //Code to check if the Product Type can be deleted using the stored procedure given
+                using (var conn = ConnectionManager.DatabaseConnection())
+                {
+                    using (var cmd = new SqlCommand("sp_ProductTypes_AllowDeleteProductType", conn))
+                    {
+                        cmd.CommandType = CommandType.StoredProcedure;
+                        cmd.Parameters.AddWithValue("ProductTypeID", deleteProductType.ProductTypeID);
+                        cmd.Parameters.Add("RecordCount", SqlDbType.Int).Direction = ParameterDirection.Output;
+                        cmd.Transaction = conn.BeginTransaction();
+                        cmd.ExecuteNonQuery();
+                        cmd.Transaction.Commit();
+                        int validDelete = Convert.ToInt32(cmd.Parameters["RecordCount"].Value);
+                        if (validDelete == 1)
+                        {
+                            MessageBox.Show("Product Type can not be deleted.", "Error");
+                            return;
+                        }
+                    }
+                    //Code to delete the Product Type
+                    using (var cmd = new SqlCommand("sp_ProductTypes_DeleteProductType", conn))
+                    {
+                        cmd.CommandType = CommandType.StoredProcedure;
+                        cmd.Parameters.AddWithValue("ProductTypeID", deleteProductType.ProductTypeID);
+
+                        cmd.Transaction = conn.BeginTransaction();
+                        cmd.ExecuteNonQuery();
+                        cmd.Transaction.Commit();
+
+                        DisplayProductTypes(); //Refresh the table
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Please select a Product Type to delete from the table.", "Error");
+            }
+        }
+    }
+}
diff --git a/Acme Project/Acme Project/Presentation Layer/ProductTypes/MainProductTypes.resx b/Acme Project/Acme Project/Presentation Layer/ProductTypes/MainProductTypes.resx
@@ -0,0 +1,132 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <metadata name="ProductTypeID.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="ProductType.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="ProductTypeID.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="ProductType.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+</root>
diff --git a/Acme Project/Acme Project/Presentation Layer/ProductTypes/UpdateProductTypes.Designer.cs b/Acme Project/Acme Project/Presentation Layer/ProductTypes/UpdateProductTypes.Designer.cs
diff --git a/Acme Project/Acme Project/Presentation Layer/ProductTypes/UpdateProductTypes.cs b/Acme Project/Acme Project/Presentation Layer/ProductTypes/UpdateProductTypes.cs
@@ -0,0 +1,62 @@
+using Acme_Project.Business_Logic_Layer;
+using Acme_Project.Data_Access_Layer;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Data.SqlClient;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Acme_Project.Presentation_Layer.ProductTypes
+{
+    public partial class frmUpdateProductTypes : Form
+    {
+        public frmUpdateProductTypes(_ProductType productType)
+        {
+            InitializeComponent();
+            //Fill in the form
+            txtProductTypeID.Text = productType.ProductTypeID.ToString();
+            txtProductType.Text = productType.ProductType;
+        }
+
+        private void btnUpdateProductTypes_Click(object sender, EventArgs e)
+        {
+            if (validateInput())
+            {
+                //Create an object of the ProductType class.
+                var updateExistingProductType = new _ProductType(int.Parse(txtProductTypeID.Text),
+                    txtProductType.Text);
+
+                using (var conn = ConnectionManager.DatabaseConnection())
+                {
+                    //Specify the Stored Procedure
+                    using (var cmd = new SqlCommand("sp_ProductTypes_UpdateProductType", conn))
+                    {
+                        cmd.CommandType = CommandType.StoredProcedure;
+                        cmd.Parameters.AddWithValue("ProductTypeID", updateExistingProductType.ProductTypeID);
+                        cmd.Parameters.AddWithValue("ProductType", updateExistingProductType.ProductType);
+
+                        cmd.Transaction = conn.BeginTransaction();
+                        cmd.ExecuteNonQuery();
+                        cmd.Transaction.Commit();
+                    }
+                }
+                this.Close();
+            }
+        }
+
+        private bool validateInput()
+        {
+            if (String.IsNullOrEmpty(txtProductType.Text))
+            {
+                MessageBox.Show("Please enter the Product Type.");
+                return false;
+            }
+            return true;
+        }
+    }
+}
diff --git a/...entatin Layer/Products/UpdateProduct.resx → ...ayer/ProductTypes/UpdateProductTypes.resx b/...entatin Layer/Products/UpdateProduct.resx → ...ayer/ProductTypes/UpdateProductTypes.resx
diff --git a/...tin Layer/Products/AddProduct.Designer.cs → ...ion Layer/Products/AddProduct.Designer.cs b/...tin Layer/Products/AddProduct.Designer.cs → ...ion Layer/Products/AddProduct.Designer.cs
diff --git a/.../Presentatin Layer/Products/AddProduct.cs → ...Presentation Layer/Products/AddProduct.cs b/.../Presentatin Layer/Products/AddProduct.cs → ...Presentation Layer/Products/AddProduct.cs
diff --git a/...ect/Presentatin Layer/Sales/AddSales.resx → ...esentation Layer/Products/AddProduct.resx b/...ect/Presentatin Layer/Sales/AddSales.resx → ...esentation Layer/Products/AddProduct.resx
diff --git a/...n Layer/Products/mainProducts.Designer.cs → ...n Layer/Products/MainProducts.Designer.cs b/...n Layer/Products/mainProducts.Designer.cs → ...n Layer/Products/MainProducts.Designer.cs
diff --git a/...resentatin Layer/Products/mainProducts.cs → ...esentation Layer/Products/MainProducts.cs b/...resentatin Layer/Products/mainProducts.cs → ...esentation Layer/Products/MainProducts.cs
diff --git a/...sentatin Layer/Products/mainProducts.resx → ...entation Layer/Products/MainProducts.resx b/...sentatin Layer/Products/mainProducts.resx → ...entation Layer/Products/MainProducts.resx
diff --git a/... Layer/Products/UpdateProduct.Designer.cs → ... Layer/Products/UpdateProduct.Designer.cs b/... Layer/Products/UpdateProduct.Designer.cs → ... Layer/Products/UpdateProduct.Designer.cs
diff --git a/...esentatin Layer/Products/UpdateProduct.cs → ...sentation Layer/Products/UpdateProduct.cs b/...esentatin Layer/Products/UpdateProduct.cs → ...sentation Layer/Products/UpdateProduct.cs
diff --git a/.../Presentatin Layer/Sales/UpdateSales.resx → ...ntation Layer/Products/UpdateProduct.resx b/.../Presentatin Layer/Sales/UpdateSales.resx → ...ntation Layer/Products/UpdateProduct.resx
diff --git a/...sentatin Layer/Sales/AddSales.Designer.cs → ...entation Layer/Sales/AddSales.Designer.cs b/...sentatin Layer/Sales/AddSales.Designer.cs → ...entation Layer/Sales/AddSales.Designer.cs
diff --git a/...oject/Presentatin Layer/Sales/AddSales.cs → ...ject/Presentation Layer/Sales/AddSales.cs b/...oject/Presentatin Layer/Sales/AddSales.cs → ...ject/Presentation Layer/Sales/AddSales.cs
diff --git a/Acme Project/Acme Project/Presentation Layer/Sales/AddSales.resx b/Acme Project/Acme Project/Presentation Layer/Sales/AddSales.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
diff --git a/...entatin Layer/Sales/MainSales.Designer.cs → ...ntation Layer/Sales/MainSales.Designer.cs b/...entatin Layer/Sales/MainSales.Designer.cs → ...ntation Layer/Sales/MainSales.Designer.cs
diff --git a/...ject/Presentatin Layer/Sales/MainSales.cs → ...ect/Presentation Layer/Sales/MainSales.cs b/...ject/Presentatin Layer/Sales/MainSales.cs → ...ect/Presentation Layer/Sales/MainSales.cs
diff --git a/...ct/Presentatin Layer/Sales/MainSales.resx → ...t/Presentation Layer/Sales/MainSales.resx b/...ct/Presentatin Layer/Sales/MainSales.resx → ...t/Presentation Layer/Sales/MainSales.resx
diff --git a/...tatin Layer/Sales/UpdateSales.Designer.cs → ...ation Layer/Sales/UpdateSales.Designer.cs b/...tatin Layer/Sales/UpdateSales.Designer.cs → ...ation Layer/Sales/UpdateSales.Designer.cs
diff --git a/...ct/Presentatin Layer/Sales/UpdateSales.cs → ...t/Presentation Layer/Sales/UpdateSales.cs b/...ct/Presentatin Layer/Sales/UpdateSales.cs → ...t/Presentation Layer/Sales/UpdateSales.cs
diff --git a/Acme Project/Acme Project/Presentation Layer/Sales/UpdateSales.resx b/Acme Project/Acme Project/Presentation Layer/Sales/UpdateSales.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>