Merge pull request graphql#555 from joemcbride/patch-1

GraphQL .NET sample code

Author: orta

site/code/index.html.js

@@ -42,7 +42,34 @@ In addition to the GraphQL [reference implementations in JavaScript](#javascript
 
 ### C# / .NET
 
-  - [graphql-dotnet](https://github.com/graphql-dotnet/graphql-dotnet): GraphQL for .NET
+#### [graphql-dotnet](https://github.com/graphql-dotnet/graphql-dotnet): GraphQL for .NET
+
+\`\`\`csharp
+using System;
+using GraphQL;
+using GraphQL.Types;
+
+public class Program
+{
+  public static void Main(string[] args)
+  {
+    var schema = Schema.For(@"
+      type Query {
+        hello: String
+      }
+    ");
+
+    var json = schema.Execute(_ =>
+    {
+      _.Query = "{ hello }";
+      _.Root = new { Hello = "Hello World!" };
+    });
+
+    Console.WriteLine(json);
+  }
+}                   
+\`\`\`
+
   - [graphql-net](https://github.com/ckimes89/graphql-net): Convert GraphQL to IQueryable
   - [Hot Chocolate](https://github.com/ChilliCream/hotchocolate): GraphQL Server for .NET core and .NET classic