Build: Fixed tests build on release mode

Author: Nucs

test/NumSharp.UnitTest/Backends/Unmanaged/StackedMemoryPoolTests.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Text;
 using System.Threading;
 using FluentAssertions;
@@ -15,6 +16,7 @@ public class StackedMemoryPoolTests
         [TestMethod]
         public void Case1()
         {
+#if DEBUG
             var l = new Stack<IntPtr>();
             var stack = new StackedMemoryPool(12, 100);
             stack.GarbageCollectionDelay = 1000;
@@ -36,7 +38,7 @@ public void Case1()
 
             stack.Return(l.Pop());
             manual.Wait(5000).Should().BeTrue();
+#endif
         }
     }
 }
-