hii,
While importing excel file, i'm getting exception in following line.
Excel.Application xlApp = new Excel.Application();
Exception - "Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))."