Question

I want to return multiple parameter from a method in c#.I just wanted to know which one is better out or Tuple?

static void Split (string name, out string firstNames, out string lastName)
{
    int i = name.LastIndexOf (' ');
    firstNames = name.Substring (0, i);
    lastName   = name.Substring (i + 1);
}


static Tuple<string,string> Split (string name)
{
//TODO
}

Answer 1

There is usually a (value) class hiding somewhere if you need to return more than one value from a method. How about a value class with the Split() method as ctor:

public class Name
{
    public Name(string name)
    {
        int i = name.LastIndexOf (' ');
        FirstNames = name.Substring (0, i);
        LastName   = name.Substring (i + 1);
    }

    public string FirstName {get; private set;}
    public string LastName {get; private set;}
}

Instead of

Split(name, out string firstName, out string lastName);

just do

Name n = new Name(name);

and access the first and last name via n.FirstName and n.LastName.