Noted Like operator is not supported in .NET Core (dotnet#10639)

* Noted Like operator is not supported in .NET Core

* Update docs/visual-basic/language-reference/operators/like-operator.md

Co-Authored-By: rpetrusha <ronpet@microsoft.com>

Author: Ron Petrusha

docs/visual-basic/language-reference/operators/like-operator.md

@@ -25,7 +25,10 @@ ms.assetid: 966283ec-80e2-4294-baa8-c75baff804f9
 ---
 # Like Operator (Visual Basic)
 Compares a string against a pattern.  
-  
+
+> [!IMPORTANT]
+> The `Like` operator is currently not supported in .NET Core and .NET Standard projects.
+
 ## Syntax  
 
 ```