System.ArgumentException: Route collection route named "XXX" already exists. Route name must be unique.

Software Environment : Visual Studio 2017 + MVC4 + EF6

Problem Description : System.ArgumentException: Route collection route named "XXX" already exists. Route name must be unique.

Solution : Delete the bin directory, rebuild and run the project.

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Origin www.cnblogs.com/bossing/p/11612421.html