C# - How to write a 2D array into a text file and open it back up?

[Tom-Colin Kelly]

Hello

I am currently coding in C#; very similar to Java, and i cannot for the life of me figure something out. I want to be able to save the contents of an array into a .txt file so that it can be opened up, this is so that i can save and open the programme, and the properties will all stay the same, if that makes sense?

currently i have just been looking around and trying out different things.

Here is what i have?

private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFileDialog of = new OpenFileDialog();
            of.ShowDialog();
            string[] Names = of.FileName;


             StreamWriter sw = new StreamWriter(textBox1.Text,true);
             sw.WriteLine(textBox1.Text);
             sw.Close();
        }

As you can see, the 2d array here is 'Names' and i want to be able to save this array into a text file with the click of a button, and also hopefully open it back up?

any help would be greatly appreciated, thanks.