Usage of AppDomain.CreateInstanceFromAndUnwrap method

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i am trying to load a Windows Form Assembly at run time to a seprate AppDomain.
I don't want that this Assembly to be loaded in the Caller Domain, so i used the metho
CreateInstanceFromAndUnwrap instead of AppDomain.Load(..
// I am passing the Control's parent through the constructor argumen
Object[] args1 = new Object[] {this}
AppDomainSetup info = new AppDomainSetup()
info.ApplicationBase = "file:///" + System.Environment.CurrentDirectory
AppDomain MyDomain = AppDomain.CreateDomain("MyDomain", null, info)
MyControl.MyControl Ctrl = (MyControl.MyControl) MyDomain.CreateInstanceFromAndUnwrap("D:\Test\MyControl.dll",MyControl.MyControl
false,BindingFlags.Public,null,args1,null,null,null)
But when i do this i get an exception thrown "Constructor on type MyControl.MyControl not found
What should be cause of this issue?

If i try to use the CreateInstanceFromAndUnwrap using the two parameters just the assembly and type, the functio
returns me the control object. But when i try to set the Parent of the control using the followin
code
Ctrl.Parent = this

then system throws an exception the message is
The type System.Windows.Forms.Form+ControlCollection in Assembly System.Windows.Forms, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 is not marked as serializable

What am i doing any thing wrong in this both scenarios
Or is it advisable to have a design where i can load my Windows Forms Assemblies in to a seprat
Domain and use, and later unload it

Any body please help....