Entity Framework The underlying provider failed on Open

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Seems like a connection issue. You can use the Data link properties to find if the connection is fine. Do the following:

  1. Create a blank notepad and rename it to “X.UDL”
  2. Double click to open it
  3. Under connections tab choose the server name/enter the name
    use the correct credentials and DB
  4. Click OK to save it.

Now open the file in Notepad and compare the connection string properties.

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