Problem in UNIT Test

Hi All,

i'm developing web application using VS2015 and i created unit test script.

I'm getting error while debugging the unit test script, the error says "Unable to load Oracle.DataAccess.dll". This dll i'm not using in my application. inseated of using this DLL i created on Data Access Layer dll which is contain this Oracle.DataAccess.dll.i refrenced this Data Access layer dll.