I found a solution that helped me solve the dragging table onto .dbml designer view in Visual Studio 12
- Replace the dsref80.dll driver: C:\Program Files (x86)\Common Files\microsoft shared\Visual Database Tools\dsref80.dll OR C:\Program File\Common Files\microsoft shared\Visual Database Tools\dsref80.dll
- With the dserf80.dll you can download from the link below: www.wincabs.com/free-dll/?db=d&file=Dsref80 (the link works no longer but other can be googled like this one here)