diff --git a/samples/snippets/csharp/VS_Snippets_CLR_System/System.Threading.ThreadPriority/cs/Example1.cs b/samples/snippets/csharp/VS_Snippets_CLR_System/System.Threading.ThreadPriority/cs/Example1.cs
index 5ef90c17d22..13f5e1aafe3 100644
--- a/samples/snippets/csharp/VS_Snippets_CLR_System/System.Threading.ThreadPriority/cs/Example1.cs
+++ b/samples/snippets/csharp/VS_Snippets_CLR_System/System.Threading.ThreadPriority/cs/Example1.cs
@@ -29,7 +29,7 @@ static void Main()
 
 class PriorityTest
 {
-    static bool loopSwitch;
+    static volatile bool loopSwitch;
     [ThreadStatic] static long threadCount = 0;
 
     public PriorityTest()