VS 2008 SP1 abstract Form/UserControl not working even when using Brian Pepin, Urban Potato, technique. Help...

Hello everyone,

I'm using Visual Studio 2008 SP1 and I'm following this article:

http://www.urbanpotato.net/default.aspx/document/2001

So I created a new WindowsFormsApplication project. I added this code to the Form1.cs file

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namespaceWindowsFormsApplication70 

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{ 

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[TypeDescriptionProvider(typeof(ConcreteClassProvider))] 

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publicabstractpartialclassForm1:Form 

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{ 

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publicForm1() 

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{ 

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InitializeComponent(); 

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} 

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publicabstractstringAbstractProperty{get;set;} 

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} 

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//HereisaconcreteversionofAbstractFormthatactsasastandin 

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internalclassConcreteForm:Form1 

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{ 

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string_abstractProperty; 

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publicoverridestringAbstractProperty 

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{ 

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get{return_abstractProperty;} 

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set{_abstractProperty=value;} 

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} 

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} 

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//Hereisourtypedescriptionprovider.Allourproviderneedsto 

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//doisreturnConcreteFormasthereflectiontype. 

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internalclassConcreteClassProvider:TypeDescriptionProvider 

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{ 

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//BecauseweonlywanttoaugmentthemetadataforAbstractForm,insteadof 

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//completelyreplaceit,wepassintothebaseclassthecurrenttype 

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//descriptionprovider.Thisistheproviderthatnormallyhandles 

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//metadataforAbstractForm.Bydoingthisallwehavetodois 

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//overridetheareaswewanttochange. 

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publicConcreteClassProvider():base(TypeDescriptor.GetProvider(typeof(Form1))){} 

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//Tellanyonewhoreflectsonusthattheconcreteformisthe 

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//formtoreflectagainst,nottheabstractform.Thisway,the 

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//designerdoesnotseeanabstractclass. 

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publicoverrideTypeGetReflectionType(TypeobjectType,objectinstance) 

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{ 

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if(objectType==typeof(Form1)) 

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{ 

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returntypeof(ConcreteForm); 

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} 

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returnbase.GetReflectionType(objectType,instance); 

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} 

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//IfthedesignertriestocreateaninstanceofAbstractForm,weoverride 

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//itheretocreateaconcereteforminstead. 

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publicoverrideobjectCreateInstance(IServiceProviderprovider,TypeobjectType,Type[]argTypes,object[]args) 

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{ 

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if(objectType==typeof(Form1)) 

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{ 

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objectType=typeof(ConcreteForm); 

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} 

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returnbase.CreateInstance(provider,objectType,argTypes,args); 

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} 

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} 

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}

I build the solution and everything works fine. Then I added another Form called Form2 and this is what I have on that Form2.cs file:

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namespaceWindowsFormsApplication70 

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{ 

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publicpartialclassForm2:Form1 

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{ 

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privatestring_AbstractProperty; 

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publicForm2() 

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{ 

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InitializeComponent(); 

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} 

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publicoverridestringAbstractProperty 

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{ 

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get

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{ 

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returnthis._AbstractProperty; 

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} 

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set

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{ 

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this._AbstractProperty=value; 

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} 

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} 

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} 

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}

All pretty basic as you can see.... When I try to open Form2 in the Designer I get the usual error:

The designer must create an instance of type 'WindowsFormsApplication70.Form1' but it cannot because the type is declared as abstract.

Any ideas why is the designer still giving me this error? Did I miss something?

Thanks a lot in advance

VS 2008 SP1 abstract Form/UserControl not working even when using Brian Pepin, Urban Potato, technique. Help...

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