Refresh a form after making edits on second [duplicate]

Answer 1

Create an own event on form2 that triggers when the button gets clicked. This way you can just form2.OnUpdateClicked += yourMethod. Like this:

public partial class Form1 : Form
{
    private void CreateForm2()
    {
        Form2 frm2 = new Form2();
        // Hook the event of form2 to a method
        frm2.PropertyUpdated += Form2Updated;
    }

    private void Form2Updated(object sender, EventArgs e)
    {
        // this will be fired
    }
}

public partial class Form2 : Form
{
    // On form2 create an event
    public event EventHandler PropertyUpdated;

    private void Form2UpdateButton_Click()
    {
        // If not null (e.g. it is hooked somewhere -> raise the event
        if(PropertyUpdated != null)
            PropertyUpdated(this, null);
    }
}