design-time error in windows form

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Hi

The error is " Cannot find type system.diagnostics.debuggerdisplay attribute in module commonLanguageRuntime Library "

i m getting this design time error in all forms in my application ...how to solve that

thanks in advance
darshan

Posted 30-Nov-12 3:56am

darshan559

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Abhishek Pant 30-Nov-12 11:53am

using System.Diagnostics;

Abhishek Pant 30-Nov-12 11:54am

http://msdn.microsoft.com/en-us/library/system.diagnostics.debuggerdisplayattribute.aspx

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Sergey Alexandrovich Kryukov · Answer 1 · 2012-11-30T08:46:00

This is not really design-time. This is a normal compilation error. Well, find this attribute and make the code using it properly. But more importantly, remove everything not related to basic form design stuff from design level, and stay our of trouble. I would advise to use the designer only for general form or user control layout.

Now, I would like to advise in advance for the cases when compilation is successful, but some exceptions during design time prevents your from opening design views. This is a very typical problem stemmed from the overuse of the designer. With controls, this is not so easy, because they are custom and designed to include some advanced behavior. Here is one miracle tool: the proper use of the property System.ComponentModel.Component.DesignMode for all your controls. You can safeguard anything not directly related to layout used in the process of using the designer with the check of this property:

C#

// in the code of some Control or other Component:
if (!this.DesignMode) {
    // do something risky not related to basic layout behavior here
}

This simple trick can really save you from a lot of trouble.

—SA