update EntityGraphQL information

src/content/code/language-support/c-net/server/entity-graphql.md

@@ -1,8 +1,52 @@
 ---
 name: Entity GraphQL
-description: .NET Core GraphQL library. Compiles to IQueryable to easily expose a schema from an existing data model (E.g. from an Entity Framework data model)
+description: A GraphQL library for .NET Core. Easily expose you data model as a GraphQL API or bring together multiple data sources into a single GraphQL schema.
 url: https://github.com/EntityGraphQL/EntityGraphQL
 github: EntityGraphQL/EntityGraphQL
 ---
 
+```csharp
+// expose an exisiting data model with ASP.NET & EF Core
+public class Startup {
+  public void ConfigureServices(IServiceCollection services)
+  {
+      services.AddControllers().AddNewtonsoftJson();
+      services.AddDbContext<MyDbContext>();
+      // Build a schema from your data model (See docs on how to extend, modify or build manually as well as merge other data sources).
+      services.AddSingleton(SchemaBuilder.FromObject<MyDbContext>());
+  }
+}
 
+// expose an endpoint with ASP.NET
+[Route("api/[controller]")]
+public class QueryController : Controller
+{
+    private readonly MyDbContext _dbContext;
+    private readonly SchemaProvider<MyDbContext> _schemaProvider;
+
+    public QueryController(MyDbContext dbContext, SchemaProvider<MyDbContext> schemaProvider)
+    {
+        this._dbContext = dbContext;
+        this._schemaProvider = schemaProvider;
+    }
+
+    [HttpPost]
+    public object Post([FromBody]QueryRequest query)
+    {
+        try
+        {
+            var results = _schemaProvider.ExecuteQuery(query, _dbContext, null, null);
+            if (results.Errors?.Count > 0)
+            {
+                // log error
+                return StatusCode(StatusCodes.Status500InternalServerError, results);
+            }
+            return results;
+        }
+        catch (Exception)
+        {
+            return HttpStatusCode.InternalServerError;
+        }
+    }
+}
+```