No symbols are loaded for any call stack frame. The source code cannot be displayed.

[dee-u]

And it also raises the exception "Cross-thread operation not valid: Control 'explorerBar1' accessed from a thread other than the thread it was created on." although I am not calling the form which contains explorerBar1 so I am baffled.

This is the last lines of the disassembly which I cannot figure out.

000000ac mov edx,dword ptr [ebp-8]
000000af call FF74DC7B
000000b4 mov edx,eax
000000b6 mov ecx,esi
000000b8 call FF71A9AB
000000bd mov ecx,esi
000000bf call FF71E2E3
000000c4 int 3

The problem is raised when I quickly click on treeview items which shows the form associated with it via its tag property. This is the code which calls the form.

private void item_Click(object sender)
{
    Assembly asm = Assembly.LoadFrom(Assembly.GetExecutingAssembly().GetName().CodeBase);
    Common.CommonFunctions.Busy(true);
    if (e.Item.Tag != null)
    {
        string formName = string.Empty;
        foreach (Form f in this.MdiChildren)
        {
            formName = f.Name;
            if (formName == e.Item.Tag.ToString())
            {
                f.Activate();
                this.Focus();
                return;
            }
            else
                f.close();
        }
 
        Type formObject = asm.GetType("ApplicationLayer." + e.Item.Tag.ToString());
        Object formActivator = Activator.CreateInstance(formObject);
        Form frm = formActivator as Form;
        frm.MdiParent = this;                
        frm.Show();
        this.Focus();
    }
    Common.CommonFunctions.Busy(false);
}

Could anyone help me out on looking for the cause of the error and fixing it?

EDIT:
After a few more testing it still shows the above disassemply I quoted, could anyone figure out what the message is?