Could not be found

Question

When I use the EntityFramework.Extended in my RiceBuySellProvider project, I got this error in my main project :

The type or namespace name I remove the 'RiceBuySellProvider' could not be found (are you missing a using directive or an assembly reference?)

From MainProject Image

But when I remove the .FutureFirstOrDefault() of EntityFramework.Extended from my RiceBuySellProvider and no errors found. Why?

UPDATE

When I use the .FutureFirstOrDefault() this will be the cause of the error.

public static ProductEntity GetProduct(string productNo)
{
    using (var con = new RiceBuySellEntities(ConnectionStr))
        return CompiledQueries.GetProCatTypeUnit.Invoke(con, productNo).FutureFirstOrDefault();
}

Answer 1

You need to add a reference to the assembly that holds the namespace you are importing.

Project Properties > Refernces

Its possible that the Rice assembly targets an incompatible framework, or that its bittyness (x86 / x64) is mismatched.