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VS 2010 Design Time Issue

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Hi,

I'm pretty sure the following is going to be fairly straightforward but it's one of those situations where I think i've been looking at the code too long and now I don't know how to progress!

Background:

I have a component class (let's call it master). One of the properties in this class is an interface - ie: Public Property FileMethod as iFileMethod - where iFileMethod is the interface.

I have a second component class which implements said interface (lets call it slave). I drag component class master onto my form. I drag component class slave onto my form. I set the property in the property grid for FileMethod - Slave appears in the drop down list but the error appears that object reference is not set to an instance of an object.

The question here is how do I get around this without dragging slave into the form first before master?

Many thanks

Chris

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