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A string carries methods of its own. A few you will reach for constantly:

Program.cs

using System;

class Program
{
    static void Main()
    {
        string name = "  Ada Lovelace  ";

        Console.WriteLine(name.Trim());
        Console.WriteLine(name.Trim().ToUpper());
        Console.WriteLine(name.Trim().Length);
        Console.WriteLine(name.Contains("Ada"));
    }
}

Output

Ada Lovelace
ADA LOVELACE
12
True

Strings do not change

ToUpper() returns a new string; it does not modify the original. That is why you chain the calls rather than expecting name to have changed.

Things strings can do

Things strings can do