Perform Trim() while using Split()

Another possible option (that avoids LINQ, for better or worse):

string line = " abc, foo  ,     bar";
string[] parts= Array.ConvertAll(line.Split(','), p => p.Trim());

However, if you just need to know if it is there – perhaps short-circuit?

bool contains = line.Split(',').Any(p => p.Trim() == match);