default behavior in an application

I have index.aspx , index.html and another mvc application. I found mvc application takes the priority to execute. I want to know how to determine th开发者_StackOverflowe sequence.

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In IIS you can specify the order of default documents:

Also you might want to exclude those documents from your MVC application routes so that they are directly served by IIS:

routes.IgnoreRoute("default.htm");