Error in code a code.

Question

public ActionResult AddFavourite(int? Favid, string Type)

{

FavouriteMang obj_favouriteman = new FavouriteMang();

tblSequence obj_tblSequence = new tblSequence();

int MaxOrderNumber = _db.tblSequences.Count();

if (Type == "Team")

{

var tblteam = _db.tblTeams.Where(u => u.Team_Id == Favid).FirstOrDefault();

tblteam.IsFavourite = true;

}

else if (Type == "League")

{

// FavouriteMang obj_favouriteman = new FavouriteMang();

try

{

if (Type == "Team")

{

var tblteam = _db.tblTeams.Where(u => u.Team_Id == Favid).FirstOrDefault();

tblteam.IsFavourite = true;

}

else if (Type == "League")

{

var tblleague = _db.tblLeagues.Where(u => u.LeagueId == Favid).FirstOrDefault();

tblleague.IsFavourite = true;

}

else if (Type == "Club")

{

var tblclub = _db.tblClubs.Where(u => u.ClubId == Favid).FirstOrDefault();

tblclub.IsFavourite = true;

}

_db.SaveChanges();

}

catch (Exception)

{

throw;

}

_db.SaveChanges();

obj_tblSequence.FavType = Type;

obj_tblSequence.IdFav = Favid;

obj_tblSequence.OrderNumber = MaxOrderNumber + 1;

_db.tblSequences.Add(obj_tblSequence);

_db.SaveChanges();

return View();

}

}

}

}

 

 C# '': not all code paths return a value- this error show.

This is my code . Face a problem plzz solve error. ()