vs2010 open edmx file error RRS feed

  • Question

  • could not open file or assembly 'Microsoft.Data.Entity.Design.Extensibility'

    How to fix this error ?

    Monday, November 25, 2013 6:56 AM


  • Hello,

    The latest version of Microsoft.Data.Entity.Design.Extensibility is compiled against .NET Framework 4.5. This causes an error that manifests in one of two ways:

    For existing projects, the assembly cannot be found, "The referenced component 'Microsoft.Data.Entity.Design.Extensibility' could not be found."

    For new projects targeting .NET Framework 4, Microsoft.Data.Entity.Design.Extensibility not longer appears under Assemblies > Extensions in Reference Manager.

    So have a try to let the program target .NET Framework 4.5.

    Or have a try to use the ADO.NET Entity Data Model Tools, the Entity Data Model Tools are designed to help you build Entity Framework applications. For details, see here.

    For issue with "could not open file or assembly 'Microsoft.Data.Entity.Design.Extensibility'", you can check links below:




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    • Marked as answer by Fred Bao Monday, December 2, 2013 7:05 AM
    Tuesday, November 26, 2013 3:01 AM