open form from string form name and check if the form is already opened or not c#

Hi,

I am trying to open a form from string form name
and it works
then i want to check if the form is already opened or not

this is my button click event

_projectname = "myCollections";
_formname = "myGames";

object myobject = new object();
Type myForm = Assembly.GetExecutingAssembly().GetType(_projectname + ".Forms." + _formname);

if (myForm != null)
{
     myobject = Activator.CreateInstance(myForm);

     //PROBLEM HERE
     Form checkform = myglobal_methods.IsFormAlreadyOpen(typeof((Form)myobject)));

     ((Form)myobject).Show();
}

then i have a method to check if the form is already opened

public static Form IsFormAlreadyOpen(Type FormType)
{
     foreach (Form OpenForm in Application.OpenForms)
     {
          if (OpenForm.GetType() == FormType)
          return OpenForm;
      }
     return null;
}  

the problem is that (Form)myobject is not a Form.

How i suppose to handle this?


Thank you