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Entity constructor for .edmx file does not work in VS2010

I have a .edmx file and I cannot open it using the constructor. It simply opens as a regular XML file. When I try to “run a custom tool” on it, then it says that:

Failed to create custom tool "EntityModelCodeGenerator". Failed to load file or assembly "Microsoft.Data.Tools.VSXmlDesignerBase, Version = 10.0.0.0, ..." or one of its dependencies. The system cannot find the specified file.

And indeed, I do not have this file on my system. I tried copying it to my machine, but then I get:

An error occurred while loading the entity data model tool package.

I have installed VS2010 SP1 Professional.

I tried to repair and reinstall VS and SP1 and install some packages / patches (I don’t remember their exact names), but that didn’t help. What else can I try?

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It looks like there were no L2E tools in my installation package.

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Source: https://habr.com/ru/post/1386684/

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