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December 22, 2012 / pauldundon

Running Startup Code in .NET Libraries

The problem: You have written a .NET Class Library for use in the context of a web application and want to run some code at startup time to initialise state within the library.

Possible solution: use the System.Web.PreApplicationStartMethod attribute

Limitation: This will only take effect when the library is loaded by IIS.

Example:

<Assembly: System.Web.PreApplicationStartMethod(GetType(Startup), "DoStartup")> 
Public Class Startup
  	Public Shared Sub DoStartup()
   		' Startup code goes here
  	End Sub
End Class 
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