Add resolution guidance to CS1023 compiler error documentation (#47631)

* Initial plan

* Add resolution section to CS1023 documentation with corrected examples

Co-authored-by: BillWagner <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: BillWagner <[email protected]>

Author: Copilot

docs/csharp/misc/cs1023.md

@@ -14,6 +14,8 @@ Embedded statement cannot be a declaration or labeled statement
 
  An embedded statement, such as the statements following an **if** statement, can contain neither declarations nor labeled statements.  
 
+ To resolve this error, wrap the embedded statement in braces to create a block statement. In C#, unlike C/C++, variable declarations and labeled statements must be contained within a block statement to properly define their scope.
+  
  The following sample generates CS1023 twice:  
 
 ```csharp  
@@ -24,9 +26,33 @@ public class a
    {  
       if (1)  
          int i;      // CS1023, declaration is not valid here  
-  
+
       if (1)  
          xx : i++;   // CS1023, labeled statement is not valid here  
    }  
 }  
 ```
+
+## Example - Corrected code
+
+To fix this error, use braces to create a block statement:
+
+```csharp  
+// CS1023 - Fixed.cs  
+public class a  
+{  
+   public static void Main()  
+   {  
+      if (1)  
+      {
+         int i;      // Fixed: declaration is now in a block statement  
+      }
+
+      int j = 0;
+      if (1)  
+      {
+         xx : j++;   // Fixed: labeled statement is now in a block statement  
+      }
+   }  
+}  
+```