This one is a little difficult to explain.
I placed a RichTextBox control on my form, I called it chiMain, then I
wrote CHITextBox.cs. This class extends the RichTextbox class, and
has a constructor that looks like this: public CHITextBox () : base()
{...}
Then in Form1.Designer.cs, I changed the relevant line to:
this.CHIMain = new MyRTF.CHITextBox.CHITextBox();
The namespace is correct, it is what comes up in intellisense, anyway.
The program seems to work, but when I build it, I get the error
message mentioned in the subject. And I can't open Form1.cs [Design].
What do I do?