feat: Addition function

Calculator/Addition.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace Addition
+{
+    internal class AdditionClass
+    {
+        public static void PerformAddition()
+        {
+            int firstNumber, secondNumber, result;
+
+            Console.WriteLine("Enter your first number:");
+            firstNumber = int.Parse(Console.ReadLine());
+
+            Console.WriteLine("Enter your second number:");
+            secondNumber = int.Parse(Console.ReadLine());
+
+            result = firstNumber + secondNumber;
+            Console.WriteLine("Our Addition Result: " + result);
+        }
+    }
+}

Calculator/Program.cs

@@ -7,17 +7,8 @@ class Program
         static void Main(string[] args)
         {
             Console.WriteLine("Hello World!");
-            Multiplication();
-        }
 
-        static void Multiplication()
-        {
-            Console.Write("variable 1 =");
-            int variable1 = Convert.ToInt32(Console.ReadLine());
-            Console.Write("variable 2 =");
-            int variable2 = Convert.ToInt32(Console.ReadLine());
-            Console.WriteLine("var1 * var2 = " + (variable1 * variable2));
-            Console.ReadLine();
+            Addition.AdditionClass.PerformAddition();
         }
     }
 }