1 files changed, 37 insertions, 8 deletions

diff --git a/csharp.html.markdown b/csharp.html.markdown
index 31c0417e..bcb35d4b 100644
--- a/csharp.html.markdown
+++ b/csharp.html.markdown
@@ -27,7 +27,7 @@ Multi-line comments look like this
 //public void MethodOrClassOrOtherWithParsableHelp() {}
 
 // Specify the namespaces this source code will be using
-// The namespaces below are all part of the standard .NET Framework Class Libary
+// The namespaces below are all part of the standard .NET Framework Class Library
 using System;
 using System.Collections.Generic;
 using System.Dynamic;
@@ -45,8 +45,8 @@ using System.Data.Entity;
 // Using this code from another source file: using Learning.CSharp;
 namespace Learning.CSharp
 {
-    // Each .cs file should at least contain a class with the same name as the file
-    // you're allowed to do otherwise, but shouldn't for sanity.
+    // Each .cs file should at least contain a class with the same name as the file.
+    // You're allowed to do otherwise, but shouldn't for sanity.
     public class LearnCSharp
     {
         // BASIC SYNTAX - skip to INTERESTING FEATURES if you have used Java or C++ before
@@ -421,7 +421,7 @@ on a new line! ""Wow!"", the masses cried";
                 // Item is an int
                 Console.WriteLine(item.ToString());
         }
-        
+
         // YIELD
         // Usage of the "yield" keyword indicates that the method it appears in is an Iterator
         // (this means you can use it in a foreach loop)
@@ -437,7 +437,7 @@ on a new line! ""Wow!"", the masses cried";
             foreach (var counter in YieldCounter())
                 Console.WriteLine(counter);
         }
-        
+
         // you can use more than one "yield return" in a method
         public static IEnumerable<int> ManyYieldCounter()
         {
@@ -446,7 +446,7 @@ on a new line! ""Wow!"", the masses cried";
             yield return 2;
             yield return 3;
         }
-        
+
         // you can also use "yield break" to stop the Iterator
         // this method would only return half of the values from 0 to limit.
         public static IEnumerable<int> YieldCounterWithBreak(int limit = 10)
@@ -482,7 +482,7 @@ on a new line! ""Wow!"", the masses cried";
             // ?? is syntactic sugar for specifying default value (coalesce)
             // in case variable is null
             int notNullable = nullable ?? 0; // 0
-            
+
             // ?. is an operator for null-propagation - a shorthand way of checking for null
             nullable?.Print(); // Use the Print() extension method if nullable isn't null
 
@@ -630,7 +630,7 @@ on a new line! ""Wow!"", the masses cried";
 
     public static class Extensions
     {
-        // EXTENSION FUNCTIONS
+        // EXTENSION METHODS
         public static void Print(this object obj)
         {
             Console.WriteLine(obj.ToString());
@@ -913,6 +913,35 @@ on a new line! ""Wow!"", the masses cried";
 
         public DbSet<Bicycle> Bikes { get; set; }
     }
+
+    // Classes can be split across multiple .cs files
+    // A1.cs
+    public partial class A
+    {
+        public static void A1()
+        {
+            Console.WriteLine("Method A1 in class A");
+        }
+    }
+
+    // A2.cs
+    public partial class A
+    {
+        public static void A2()
+        {
+            Console.WriteLine("Method A2 in class A");
+        }
+    }
+
+    // Program using the partial class "A"
+    public class Program
+    {
+        static void Main()
+        {
+            A.A1();
+            A.A2();
+        }
+    }
 } // End Namespace
 ```