A System.Tuple is static class that allows you to create collection of specific data-typed values.

Values

You can store values like...

         
        Tuple tuple = new Tuple<int, string, string, bool>(1, "Matija", "Božičević", true);
         
    

...or you can create it in more easy way...

         
        var tuple = Tuple.Create(1, "Matija", "Božičević", true);
         
    


Retrieving data is also an easy "job"...

         
        int id = tuple.Item1;
        string firstName = tuple.Item2;
        string lastName = tuple.Item3;
        bool isDeveloper = tuple.Item4;
         
    


Have in mind that Tuple is immutable object, so you cannot dynamically change data in Item(s), once Tuple object is created, because it will return you compilation error:
Property or indexer 'System.Tuple<...>.Item1' cannot be assigned to—it is read only!

Arrays

You can also store objects and arrays of data:

         
        Tuple tuple = new Tuple<int[], string[]>(new int[] { 1, 2, 3 }, 
                        new string[] { "Matija Božičević", "Al Pacino", "Clint Eastwood" });