Passing value from one form to other

1) Create a public property in the form2.
2) From the Form1, create instance of the FOrm2,and assign the value for the public property.

Form 1 Code : 
private void button2_Click(object sender, EventArgs e)
{
            Form2 frm = new Form2();
            frm.MyName = "From Form 1";            
            frm.ShowDialog();
}

Form 2 Code : 

public string MyName
{
 get;
 set;
}
For this I have attached the sample project.

Another way,you can create a static class and assign the values into in Form1 . Then can access the values into form2.

Kindly let me know,still if you need any help.