Added information on how to achieve it using visual studio

docs/csharp/language-reference/keywords/extern-alias.md

@@ -31,6 +31,28 @@ You might have to reference two versions of assemblies that have the same fully-
 
  In the previous example, `GridV1::Grid` would be the grid control from `grid.dll`, and `GridV2::Grid` would be the grid control from `grid20.dll`.  
 
+## Using Visual Studio
+
+If you are using Visual Studio, aliases can be provided in similar way.
+
+Add reference of *grid.dll* and *grid20.dll* to your project in Visual Studio. Open a property tab and change the Aliases from global to GridV1 and GridV2 respectively.
+
+Use these aliases the same way above
+
+```csharp
+ extern alias GridV1;  
+
+ extern alias GridV2;  
+```
+
+Now you can create alias for a namespace or a type by *using alias directive*. For more information, see [using directive](using-directive.md).
+
+```csharp
+using Class1V1 = GridV1::Namespace.Class1;
+
+using Class1V2 = GridV2::Namespace.Class1;
+```
+
 ## C# Language Specification  
  [!INCLUDE[CSharplangspec](~/includes/csharplangspec-md.md)]