C# designer error

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My project has many forms, but only one cann't open its designer now. I have try many times, but I still don't know why.

error: Micorsoft visual studio 2010 has stopped

Posted 15-Jun-15 18:37pm

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OriginalGriff · Accepted Answer · 2015-06-15T19:10:00

This isn't a question we can answer - there are far, far too many ways you could have caused this type of problem.
The most likely is that you have added a control or code to the designer.cs file which means that the InitializeComponent method never returns: an infinite loop, or some other weirdness! :laugh:

But we can't help you there.
So start by thinking about what changed you have made since the last time it did work and try reversing them. If you have a Source control system, find out what exactly changes you have made, if not then your most recent backup may help.

You may have to manually edit the designer.cs file until it will load - so backup first in case you completely wreck things!
I've had this before, and it can be a PITA to track down - but there is no one solution, and nobody but you can do anything about it.
Sorry, but you will have to sort it yourself.

vinayvraman · Accepted Answer · 2015-06-15T19:23:00

The reasons for the crash can be several. But one of the most common reason is the code written in either ctor or Load method.

The easiest way to skip the designer from running your code is by using DesignMode property.

E.g.

C#

class MyForm : Form
{
 public MyForm()
 {
   InitializeComponents();

   if(DesignMode) return;

   // ... Rest of the code
 }

 protected override void OnLoad(EventArgs e)
 {
   base.OnLoad(e);

   if(DesignMode) return;

   // ... Rest of the code
 }
}

Also, if you want to know the exact line of code that is causing the error, then you can attach your VS (during design time) to a debugger (another instance of VS) and debug the designer. See this link for more information.

C# designer error

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