30. September 2010 05:17
This will be short...
I was working on a project on one machine that consisted of using Entity Framework 4. I ported the project over to another computer and was working on it on that machine. I went to go make a change to the ADO.NET Entity Data Model and was receiving odd errors about the designer not being able to open. I deleted the model and was going to regenerate my model. Well I went to do that and noticed the ADO.NET Entity Data Model Template was missing from my selection!
After some research on the internet, I noticed trying to reinstall default templates (http://msdn.microsoft.com/en-us/library/ms247116.aspx). This didn't work. I browsed to the path where the template should have been installed and it was there, just not showing up in Visual Studio 2010. I was in the process of uninstalling VS 2010 stuff and started with CTP stuff first.
Solution: I had Windows Phone 7 Developer Tools - CTP installed. I uninstalled it and all was good...all of my templates were back to normal....yea!!! Lucky me that's all it was!