you can do this using by this code:

using System.Reflection;

Assembly asm = Assembly.GetEntryAssembly();

string path = asm.GetName().ToString();

path = path.Substring(0, path.IndexOf(","));

string formname = path + "Your_Form_or_class_name_here";

Type formtype = asm.GetType(formname);

Form f = (Form)Activator.CreateInstance(formtype);

f.Show();