How to pass data from one form to other in c#

Hi,

Check this link !
Passing Data Between Forms[^]

private void button1_Click(object sender, EventArgs e)
         {
             Form2 f = new Form2("Pass your value as string");
             f.Show();
         }

and

public Form2(string strValue)
   {
   InitializeComponent();
   string GetData = strValue;
   }

0. Create a public property on Form2 to take the data
1. Set the property before the Show() method

e.g.

//Child Form
public class Form2 : Window
{
    //snip..
    public Foo TramsferredInformation {get; set;}
    //snip..
}

//Parent Form
public class Form1 : Window
{
    //snip..
    private void button1_Click(object sender, EventArgs e)
    {
        Form2 f = new Form2();
        f.TramsferredInformation = Whatever; //Obviously, you'll need to decide what this is.
        f.Show();
    }
    //snip..
}

Foo is the type of data you want to transfer, string or some complext type etc.

Off topic, its is a bad idea to have identifiers like Form1, Form2 and the variable name "f". I assume this is just for ease of use in the question, but if not use meaningful names or you'll not be able to keep track if the project size increases or other people need to look at your code.