Replaced LINQ Query demo with one which helps demonstrate OzCode v3.1…

… "Pin" feature

OzCodeDemo/13.LINQ/QuerySyntaxLinqDemo.cs

@@ -2,26 +2,38 @@
 using System.Diagnostics;
 using System.Linq;
 using OzCodeDemo.DemoClasses.Customers;
+using OzCodeDemo.DemoClasses.University;
 
 namespace OzCodeDemo._13.LINQ
 {
 	[Export(typeof(IOzCodeDemo))]
 	[ExportMetadata("Demo", "QuerySyntaxLinq")]
 	public class QuerySyntaxLinqDemo : IOzCodeDemo
 	{
-		public void Start()
-		{
-			Debugger.Break();
+	    public void Start()
+	    {
+	        Debugger.Break();
 
-			var states =
-				from customer in CustomersRepository.LoadCustomersFromDb()
-				let address = customer.Address
-				where !string.IsNullOrWhiteSpace(address.State)
-				group address by address.State
-				into stateGroup
-				select stateGroup.Key;
+	        // Get all the students whose grade is above average within their department
+	        var aboveAverageStudents =
+	            StudentRepository.GetAllDepartments()
+	                .Select(department =>
+	                    new
+	                    {
+	                        Department = department,
+	                        Average = department.Students.Average(student => student.Grade)
+	                    })
+	                .SelectMany(arg =>
+	                    arg.Department.Students.Where(
+	                        student => student.Grade >= arg.Average));
 
-			Debug.Assert( states.Count() == 19 );
-		}
-	}
+
+	        var aboveAverageStudents2 =
+	            from department in StudentRepository.GetAllDepartments()
+	            let departmentAverage = department.Students.Average(student => student.Grade)
+	            from student in department.Students
+	            where student.Grade >= departmentAverage
+	            select student.Name;
+	    }
+    }
 }

OzCodeDemo/DemoClasses/University/Department.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace OzCodeDemo.DemoClasses.University
+{
+    class Department
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public IEnumerable<Student> Students { get; set; }
+    }
+}

OzCodeDemo/DemoClasses/University/Student.cs

@@ -0,0 +1,10 @@
+namespace OzCodeDemo.DemoClasses.University
+{
+    class Student
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public string Email { get; set; }
+        public double Grade { get; set; }
+    }
+}

OzCodeDemo/DemoClasses/University/StudentRepository.cs

@@ -0,0 +1,40 @@
+using System.Collections.Generic;
+
+namespace OzCodeDemo.DemoClasses.University
+{
+    static class StudentRepository
+    {
+        public static IEnumerable<Department> GetAllDepartments()
+        {
+            return new[]
+            {
+                new Department {Id=1, Name="Math", Students = new [] {
+                    new Student{Id = 1,Name = "Barbara Montgomery",Email=  "in.faucibus.orci@sitametultricies.ca",Grade = 38},
+                    new Student{Id = 2, Name = "Ivory Benjamin", Email=  "non.dui.nec@ultricesmaurisipsum.co.uk", Grade = 81},
+                    new Student{Id= 3, Name= "Chancellor Levine", Email= "ut@loremtristique.ca", Grade= 14},
+                    new Student{Id= 4, Name= "Nicholas Barry", Email= "Vestibulum.accumsan.neque@egestasFuscealiquet.com", Grade= 21},
+                    new Student{Id= 5, Name= "Carissa Ball", Email= "rutrum@necquamCurabitur.co.uk", Grade= 70}
+                }},
+
+                new Department {Id=2, Name="Physics", Students = new [] {
+                    new Student{Id= 6, Name= "Rama Carney", Email= "Curabitur@nisl.ca", Grade= 46},
+                    new Student{Id= 7, Name= "Nadine Rollins", Email= "nisi.Aenean@vitaediam.edu", Grade = 71},
+                    new Student{Id= 8, Name= "Cameron Pollard", Email= "risus@adipiscingfringillaporttitor.org", Grade= 7},
+                    new Student{Id= 9, Name= "Juliet Hopkins", Email= "viverra@Pellentesque.ca", Grade= 76},
+                    new Student{Id= 10,Name= "Charissa Levine", Email= "ultricies.adipiscing@sempercursus.org", Grade= 27},
+                    new Student{Id = 11, Name = "Brett Bryan", Email = "Quisque.varius.Nam@vulputateposuerevulputate.com", Grade =  59},
+                    new Student{Id = 12, Name = "Zahir Short", Email = "ac.nulla@lectusjusto.ca", Grade = 55},
+                    new Student{Id = 13, Name = "Kermit Rasmussen", Email = "pede.blandit@tellus.ca", Grade =  52},
+                    new Student{Id = 14, Name = "Damon Lancaster", Email = "mauris.blandit.mattis@tempor.org", Grade =  16}}},
+
+                new Department {Id=3, Name="Biology", Students = new [] {
+                    new Student{Id = 15, Name = "Channing Leblanc", Email = "blandit.viverra.Donec@adipiscingenim.edu", Grade =  92},
+                    new Student{Id = 16, Name = "Kane Conway", Email = "amet.ultricies@erateget.com", Grade =  55},
+                    new Student{Id = 17, Name = "Vernon Whitaker", Email = "purus@enimsitamet.ca", Grade =  85},
+                    new Student{Id = 18, Name = "Cheryl Shaw", Email = "magna.a@Nunccommodoauctor.edu", Grade =  21},
+                    new Student{Id = 19, Name = "Christen Pennington", Email = "quis.pede.Praesent@turpisvitaepurus.edu", Grade =  69},
+                    new Student{Id = 20, Name = "Emily Hudson", Email = "Donec@conubia.ca", Grade =  99},
+                }}};
+        }
+    }
+}

OzCodeDemo/OzCodeDemo.csproj

@@ -129,6 +129,9 @@
     <Compile Include="DemoClasses\Customers\Address.cs" />
     <Compile Include="DemoClasses\Customers\Customer.cs" />
     <Compile Include="DemoClasses\Customers\CustomerRepository.cs" />
+    <Compile Include="DemoClasses\University\Department.cs" />
+    <Compile Include="DemoClasses\University\Student.cs" />
+    <Compile Include="DemoClasses\University\StudentRepository.cs" />
     <Compile Include="DemoName.cs" />
     <Compile Include="IOzCodeDemo.cs" />
     <Compile Include="MainWindow.xaml.cs">