How to remove yourself from an event handler?

Question

What I want to do is basically remove a function from an event, without knowing the function\'s name.

I have a FileSystemWatcher. If a file is created/

Answer 1

Steps to remove event handler with lambda expression:

public partial class Form1 : Form
{
    private dynamic myEventHandler;
    public Form1()
    {
        InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
        myEventHandler = new System.EventHandler((sender2, e2) => this.button1_Click(sender, e, "Hi there"));
        this.button1.Click += myEventHandler;
    }

    private void button1_Click(object sender, EventArgs e, string additionalInfo)
    {
        MessageBox.Show(additionalInfo);
        button1.Click -= myEventHandler;
    }
}