Spinner: fixed bug when exception occurred when the spinner button was clicked after typing a number above the maximum allowed.

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/ButtonSpinner/Spinner.cs

@@ -54,18 +54,16 @@ namespace Microsoft.Windows.Controls
         {
             ValidSpinDirections valid = e.Direction == SpinDirection.Increase ? ValidSpinDirections.Increase : ValidSpinDirections.Decrease;
 
-            if ((ValidSpinDirection & valid) != valid)
+            //Only raise the event if spin is allowed.
+            if ((ValidSpinDirection & valid) == valid)
             {
-                // spin is not allowed.
-                throw new InvalidOperationException("Spin action is not valid at this moment.");
-            }
-
                 EventHandler<SpinEventArgs> handler = Spin;
                 if (handler != null)
                 {
                     handler(this, e);
                 }
             }
+        }
 
         /// <summary>
         /// Called when valid spin direction changed.