Implement Castclass

WoofWare.PawPrint.Test/sourcesPure/IsinstFailed.cs

@@ -0,0 +1,22 @@
+public class Program
+{
+    public class Bird
+    {
+        public bool CanFly { get; set; }
+    }
+
+    public class Fish
+    {
+        public bool CanSwim { get; set; }
+    }
+
+    public static int Main(string[] args)
+    {
+        Bird sparrow = new Bird { CanFly = true };
+
+        // This should fail and return null (not throw)
+        Fish fish = sparrow as Fish;
+
+        return fish == null ? 42 : 0;
+    }
+}