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.NET Forum / .NET Framework / CLR / January 2006Intercept CLR Calls in an application
Is there any way to write a class that wraps around the CLR? Basically we have an ASP.NET application that has had some core DLL's renamed (the product has been renamed) and we're wanting to still preserve compatibility with customer developed plugins. For example, previously, we had a DLL named "BusinessManager.Data.dll", what we're wanting to do is basically intercept the call to load that DLL and instead redirect it to "Portfolio.Data.dll" (all we're doing is replacing BusinessManager with Portfolio). Does the .NET framework support this? Is there any way we could accomplish that by throwing an entry into the web.config file? Thanks a ton, Tony Valenti > Is there any way to write a class that wraps around the CLR? Basically we > have an ASP.NET application that has had some core DLL's renamed (the [quoted text clipped - 10 lines] > there any way we could accomplish that by throwing an entry into the > web.config file? Why don't you just provide a new implementation of "BusinessManager.Data.dll" which is a facade for "Portfolio.Data.dll"? David We're wanting to have as little impact on the existing infrastructure. Well, sort of. you cant do it (i think) in .Net with C# or VB.Net. You could do it with C++ by writing your own CLR host exe. The book 'Customizing the Microsoft® .NET Framework Common Language Runtime ' tells you how to do this. Actually, after looking in MSDN, the AppDomain's AssemblyResolve Event looks like it might work for you. AssemblyResolve event gets called when the CLR tries to load an assembly, but it cant find it. the event's return type is an assembly. So if your dll isnt there, you can basically manually load whatever assembly you wanted and return it. maybe > Is there any way to write a class that wraps around the CLR? Basically we > have an ASP.NET application that has had some core DLL's renamed (the product [quoted text clipped - 10 lines] > Thanks a ton, > Tony Valenti Very Nice! That is exactly what I was looking for. Do you know if there is something similar to that involving classes? It looks like I can do it through System.Reflection.Assembly.GetExecutingAssembly().ModuleResolve += new System.Reflection.ModuleResolveEventHandler(Program_ModuleResolve);
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