ASP.NET MVC 2: Breaking changes [closed]

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What will be broken after migrate to MVC 2?

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I wonder what breaking changes will c开发者_运维技巧ome with MVC 2, so how traumatic will be the migration?

How much smooth have been your experience migrating?

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The release notes have the breaking changes: ASP.NET MVC 2 RTM Release Notes

I had no problem upgrading, just some issue with registering Castle Windsor IoC container... only had to change the signature though:

Migrate from .NET MVC 1 to MVC 2 RC