Unable to load DLL 'mod_managed': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

i have started a simple project in C# console ... using Freeswitch but when starting project it has this error: Unable to load DLL 'mod_managed': The specified module could not be found. (Exception from HRESULT: 0x8007007E) mod_managed.dll is already added in my project but idon't know how to solve this error Can anyone help me ?