Update cs0136.md (#46039)

* Update cs0136.md

Update the cs0136 compile error to make more clear about the same name into and outside local block

* Update docs/csharp/misc/cs0136.md

---------

Co-authored-by: Bill Wagner <wiwagn@microsoft.com>

Author: LeMinh22621

docs/csharp/misc/cs0136.md

@@ -34,7 +34,28 @@ namespace MyNamespace
       }  
    }  
 }  
-```  
+```
+
+The compiler reports this error regardless of the textual order of the variable declarations, as shown in the following example:
+
+```csharp
+// CS0136.cs  
+namespace MyNamespace  
+{  
+   public class MyClass  
+   {  
+      public static void Main()  
+      {
+         if (true)
+         {  
+            int i = 1;   // CS0136, hides i outside this block
+         }
+         int i = 0;   
+         i++;  
+      }  
+   }  
+}  
+```
 
 From the [C# Language Specification](~/_csharpstandard/standard/basic-concepts.md#73-declarations):