Hi Marcus,

There are known "issues" with the designer and inherited controls. My guess is that VS .NET doesn't have Form1 in memory when you work with Form2. It works sometimes because of how the memory is loaded in. I have seen this with the Toolbox before when loading custom controls. There really isn't a work around but just remembering the steps you take to have Form2 load properly. Hopefully, the next version will have this fixed.

>Even more interessting is the fact that this doesn't always appear. At the moment I can see the form2 ? And I didn't change anything, just opened the project again to test a few things ?
>Has anyone else seen this problem, is it a bug ?
>
>Marcus
>
>>>>>I have set up 2 Forms. Inheritance structure:
>>>>>Windows.System.Form
>>>>>...+Form1
>>>>>.......+Form2
>>>>>
>>>>>Wenn now opening Form2 with VS Form Designer I get an error Message that the baseclass Marcus.Test.Form1 can not be loaded. Has anyone got an idea how to get around this without compiling form1 into an own assembly ?
>>>>>
>>>>>Marcus
>>>>>
>>>>>Code snippets of Class definition
>>>>>

>>>>>namespace Marcus.Test
>>>>>{
>>>>>	public class Form1 : System.Windows.Forms.Form
>>>>>	{
>>>>>......
>>>>>
>>>>>namespace Marcus.Test
>>>>>{
>>>>>	public class Form2 : Form1
>>>>>	{
>>>>>
>>>>>
>>>>>
>>>>>