sd5 4261: Form must be the first class Warning

Hi!

When I switch to the Desing tabpage I got the following warning:

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Warning
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The form must be the first class in the file in order for form resources to be compiled correctly.
Please move other classes below the form class definition or move them to other files.
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OK  
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I just placed a delegate above the form class. 

publicdelegatevoidLieferantCreatedEventHandler(object sender, LieferantCreatedEventArgs e);

Alex