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It opens as XML file only. In MS VS 2010 Ultimate + SP1.

I need to open it in model-designer.

What can I do??

Monochromie
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3 Answers3

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On the file in the solution explorer try

Right Click > Open With > ADO.NET Entity Data Model Designer

enter image description here

benni_mac_b
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    I have no option like this. Also, I even have no ADO.NET ENTITY MODEL via "add item" menu! – Monochromie Jan 10 '12 at 14:10
  • @Monochromie Do you have the "open with" option? – benni_mac_b Jan 10 '12 at 14:26
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    Seems you may need to (re) install the entity framework tools. This may help http://stackoverflow.com/questions/5696436/no-entity-data-model-edmx-template-with-visual-studio-2010-sp1-ado-net-entit – benni_mac_b Jan 10 '12 at 14:44
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I've came across the same problem in Visual Studio 2015,i tried to open the file with 

Right Click > Open With > ADO.NET Entity Data Model Designer

and the option is not there.From there i realized my installation of Visual Studio 2015 must be without some components, so i went back to setup and installed Microsoft SQL Server Data Tools and Microsoft Web Developer Tools.Finally it worked ! The options are there when you open from solution and the file can be opened

Components that i added

C.Poh
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0

Adds references to the System.Data, System.Data.Entity, System.Core, System.Security, and System.Runtime.Serialization assemblies to the project, if they do not already exist.

HEMANT KONADE
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