WinForms : adding a form1 object as a parameter of radiobutton event causes error in the Designer-CodePudding

Here are the code snippeds, form1.cs:

And, here is the Designer error:

If I pass a form object as a parameter into a normal method argument, it works fine this way, no designer & eventhandler error occurs.

However if I use events like RadioButton Checked Changed, then I get this EVENT HANDLER & DESIGNER error.

How do I fix it? I want to use form objects and their events together at the same time here, but there is an error.

CodePudding user response：

Yes, the error is expected. because CheckedChanged declaration is like this

private void radioButton1_CheckedChanged(Object sender, 
                                         EventArgs e)

You cannot pass the parameter to it.

and as @Klaus Gütter mentioned in the comment you can use this if in the same form otherwise, you can create a property for another form and use it if you are in different form.