String.xml samples -- updating per Try .NET review comments (#1916)

* updating per Try .NET review comments

* undo one small change

Co-authored-by: Maira Wenzel <[email protected]>

Author: WilliamAntonRohm

snippets/csharp/VS_Snippets_CLR/string.compare4/CS/comp4.cs

@@ -1,25 +1,27 @@
-//<snippet1>
 // Sample for String.Compare(String, Int32, String, Int32, Int32, Boolean)
 using System;
 
 class Sample 
 {
     public static void Main() 
     {
+        //<snippet1>
         String str1 = "MACHINE";
         String str2 = "machine";
         String str;
         int result;
 
         Console.WriteLine();
         Console.WriteLine("str1 = '{0}', str2 = '{1}'", str1, str2);
+
         Console.WriteLine("Ignore case:");
         result = String.Compare(str1, 2, str2, 2, 2, true);
         str = ((result < 0) ? "less than" : ((result > 0) ? "greater than" : "equal to"));
         Console.Write("Substring '{0}' in '{1}' is ", str1.Substring(2, 2), str1);
         Console.Write("{0} ", str);
         Console.WriteLine("substring '{0}' in '{1}'.", str2.Substring(2, 2), str2);
         Console.WriteLine();
+
         Console.WriteLine("Honor case:");
         result = String.Compare(str1, 2, str2, 2, 2, false);
         str = ((result < 0) ? "less than" : ((result > 0) ? "greater than" : "equal to"));
@@ -37,6 +39,6 @@ public static void Main()
         Honor case:
         Substring 'CH' in 'MACHINE' is greater than substring 'ch' in 'machine'.
         */
+        //</snippet1>
     }
 }
-//</snippet1>

snippets/csharp/VS_Snippets_CLR_System/system.string.isnullorempty/cs/isnullorempty1.cs

@@ -16,6 +16,10 @@ bool TestForNullOrEmpty(string s)
         string s2 = "";
         Console.WriteLine(TestForNullOrEmpty(s1));
         Console.WriteLine(TestForNullOrEmpty(s2));
+
+        // The example displays the following output:
+        //    True
+        //    True
         // </Snippet1>
     }
 }