diff --git a/csharp/CDSPracticalTests/Tests.cs b/csharp/CDSPracticalTests/Tests.cs
index dac6bfd..a020907 100644
--- a/csharp/CDSPracticalTests/Tests.cs
+++ b/csharp/CDSPracticalTests/Tests.cs
@@ -104,7 +104,16 @@ public class Tests {
 
         [Fact]
         public void CanSort() {
-            throw new NotImplementedException();
+
+            Assert.Equal(new int[] {
+               1,2,3,5,9,10,12
+
+            }, instance.Sort(new int[] {
+                
+                 1,10,9,5,3,12,2
+            }));
+
+            //throw new NotImplementedException();
         }
 
         [Fact]