Hi there! I building a GIS Application but wenever i run the code its giving me this error System.Runtime.InteropServices.COMException was unhandled Message= Retrieving the COM class factory for component with **CLSID {FBF5715D-A05D-11D4-A64C-0008C711C8C1} failed** due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)). and also in the Project Properties the Option for Register For COM Interop is disabled Please help me.....can anyone tell how to fix this error Thanks in Advance