Commented by: @cincuranet

Provide steps to reproduce.

Commented by: lennox mcintosh (lennox.mcintosh)

1. Create Dummy Console Application using Visual Studio 2010
2. If app.Config doen't exist add a app.config to console project.
3. Inisde app.config add the following the code (attached in system.data.xml file) underneath the configuration element.
4. Add an appropriate connection string to a Firebird server and Firebird database. Close app.config.
5. Add reference to FirebirdSql.Data.FirebirdClient.dll Assembly to project (verison 2.7.0.0).
6. Add reference to Entity Framework 4.3 (using nuget) to project.
7. Create a simple class with properties that reflects a table from your database, where each property represents a column.
8. Create a context object which extends the Entity Framework's DbContext object.
9. Add a property to this context object, give the property a type of DbSet<T> where T is the simple class from step 7.
10. Using Enitiy Framework inside the main method create a new instance of the context object and select the property in step 9 an then the .ToList method.

This should result in an error.

Please let me know if you need anything else.

Commented by: lennox mcintosh (lennox.mcintosh)

Please use the 1st system.data.xml