Pass value from one form to other form in c#.Net

STEP 1  

private static string _first;
private static string _last;
        public string First
        {
            get
            {
                return _first;
            }            
        }

        public string Last
        {
            get
            {
                return _last;
            }            
        } 

STEP 2 

private void btnSubmit_Click(object sender, EventArgs e)
        {
            //Setting properties
            _first = txtFirst.Text;
            _last = txtLast.Text;

            this.Hide();
            Form2 f2 = new Form2();
            f2.Show();
            f2.Activate();
        }
STEP 3 
Form1 f1 = new Form1();
            if (f1.First!=String.Empty || f1.Last!=String.Empty)
            {
                lblGet.Text = "Welcome "+f1.First + " " + f1.Last + "!";
            }
            else
            {
                lblGet.Text = "Oops! No Input Value Found.";
            }