fix sample code (#4408)

* fix sample output

* feedback

* feedback

Author: mairaw

samples/snippets/csharp/VS_Snippets_CLR_System/system.invalidoperationexception/cs/List_Sort2.cs

@@ -16,7 +16,7 @@ public Person(String fName, String lName)
    public int CompareTo(Person other)
    {
       return String.Format("{0} {1}", LastName, FirstName).
-             CompareTo(String.Format("{0} {1}", LastName, FirstName));
+             CompareTo(String.Format("{0} {1}", other.LastName, other.FirstName));
    }
 }
 
@@ -36,4 +36,4 @@ public static void Main()
 // The example displays the following output:
 //       Jane Doe
 //       John Doe
-// </Snippet13>
+// </Snippet13>

samples/snippets/visualbasic/VS_Snippets_CLR_System/system.invalidoperationexception/vb/List_Sort2.vb

@@ -16,8 +16,8 @@ Public Class Person : Implements IComparable(Of Person)
    Public Function CompareTo(other As Person) As Integer _
           Implements IComparable(Of Person).CompareTo
       Return String.Format("{0} {1}", LastName, FirstName).
-             CompareTo(String.Format("{0} {1}", LastName, FirstName))    
-   End Function       
+            CompareTo(String.Format("{0} {1}", other.LastName, other.FirstName))    
+   End Function
 End Class
 
 Module Example
@@ -36,5 +36,3 @@ End Module
 '       Jane Doe
 '       John Doe
 ' </Snippet13>
-
-