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Alternative Tip

Prevent code executing at Design Time in Visual Studio for Winforms Apps

By , 18 Feb 2010
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If you are designing in a WinForms component, which is anything that derives from Control at some point (Forms, UserControls, panels, etc), then you can use the following code:

if (this.Site.DesignMode)
//Do stuff

The above will throw an exception if Site is not set (in most cases it is, ie the control is in a container control). However:
if (this.DesignMode)
   //Do stuff
Will return false if there is no container. This is an alternative (and much neater) method, but may give incorrect results in certain (rare) circumstances.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Ron Beyer
President 6D Systems LLC
United States United States
I studied Software Engineering at Milwaukee School of Engineering for 2 years before switching to Management of Information Systems for a more business oriented approach. I've been developing software since the age of 14, and have waded through languages such as QBasic, TrueBasic, C, C++, Java, VB6, VB.NET, C#, etc. I've been developing professionally since 2002 in .NET.

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