System.Drawing.dll中发生未处理的“System.ApplicationException”类型异常

I have a winforms app. In development mode, when debugging from Visual Studio .NET 2003 (Yes, I know it's old, but this is a legacy project), I get this error when I try to open a new form. In order to open a new form I get an instance of the form and then I call ShowDialog() method, for example:I have a winforms app. In development mode, whe