C# nullable string error

Question

private string? typeOfContract
{
  get { return (string?)ViewState[\"typeOfContract\"]; }
  set { ViewState[\"typeOfContract\"] = value; }
}

Later

Answer 1

String is a reference type, so you don't need to (and cannot) use Nullable here. Just declare typeOfContract as string and simply check for null after getting it from the query string. Or use String.IsNullOrEmpty if you want to handle empty string values the same as null.