[question] c# algorithm

[wildrunner]

hey guys and gals
im looking for a way to create an algorithm
the algorithm needs to be randomming strings
a piece of code to describe:
string 1;
string 2;
string 3;

private void button1_Click(object sender, EventArgs e)
{
messagebox.show(insertalgorithmhere);

}

i do not need anyone to give me the complete answer but rather a hint of how-to

thanks upfront

[MartinRFC]

            String s = "";
            Random rand = new Random();
            switch(rand.Next(3))
            {
                case 0:
                    s = "String 0";
                    break;
                case 1:
                    s = "String 1";
                    break;
                case 2:
                    s = "String 2";
                    break;
            }
            textBox1.Text = s;