errors while attempting to open the form in the designer Visual Studio Professional 2019

Question

Greetings,
Tried opening a form that exists in my project. The designer opens with errors: "To prevent possible data loss before loading
the designer, the following errors must be resolved." It lists 6 errors like: Duplicate declaration of member 'label3", and 5 more
components.

I have looked in the myform.Designer.cs file and see only 1 declaration for label3. I opened myform.cs and there is no declaration for label3.
I looked in the resx, US.resx and BR.resx files and they look fine.

Where do I look to fix this problem ? It weird as I haven't changed this form in quite some time.

Thanks.

Answer 1

@Darryl Hoar , Welcome to Microsoft Q&A, based on the Gist you provided, I reproduced your problem.

The problem is that you instantiated some controls 2 times.

Please remove the following code for only one time in your designer.cs:

 this.panel15 = new System.Windows.Forms.Panel();  
  
 this.label3 = new System.Windows.Forms.Label();  
  
 this.anfcntLab = new System.Windows.Forms.Label();  
  
 this.label2 = new System.Windows.Forms.Label();  
  
 this.label1 = new System.Windows.Forms.Label();  
  
  this.listBox1 = new System.Windows.Forms.ListBox();  

After removing these code, Please rebuild your project and you could see the form without the error:

Best Regards,
Jack

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