I have a problem when open new query SQL server 2012

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i have this error on sql server 2012 ,

No exports were found that match the constraint: 
ContractName 
Microsoft.VisualStudio.Text.ITextDocumentFactoryService 
RequiredTypeIdentity
Microsoft.VisualStudio.Text.ITextDocumentFactoryService

please any one help me i can't work on sql server

What I have tried:

i deleted the cash folder

ComponentModelCache

on sql and VisualStudio folder

Posted 2-Sep-17 10:26am

ÂĦmâd Ŝâlâĥ

Updated 3-Sep-17 1:15am

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RickZeeland · Answer 1 · 2017-09-03T01:15:00

Maybe this will be of help to you: visual studio - VS 2013 Error-"No exports were found that match the constraint:" - Stack Overflow[^]

Also you can run into problems if your version of Visual Studio does not match the SQL Server version.
Personally I have given up on trying to use SQL Server from Visual Studio, there are too many complications, I just use code to connect and execute SQL commands.

If you want to use a database that is efficient, really free and easy to install, I can recommend PostgreSQL in combination with the NpgSQL driver for C#, added bonus is that it runs on multiple platforms.