Google Drive API Delete File

Question

Hi , I am using Google Drive API and i want to delete files of "Share with me" folder.this is my code ////////////////////////////////

public void DeleteFile(string fileID, DriveService service)

{

var fileId = fileID; //"0BwwA4oUTeiV1UVNwOHItT0xfa2M";

var request = service.Files.Delete(fileId);

var file = request.Execute();

}

//////////////////////////////

 this code is give a error 403 Permission error How we solve .... Thanks in Advance please don't give a link ..Thanku