Not getting value for admin via reference

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Visual-Studio

C#5.0

Hello Friend Im making an Application in this application all i want is value name to be display in different location when user is login.. so here is the deal . i want to show the Current AdminName who is Logged in IN the label so that i can do database updation like username update in basic of current user logged remove admin rights etc etc.. now im accessing the current admin Username like this i have Admin SettingPanel in which im taking current AdminName as below

public void newname(string Admin)
        {

            adName.Text = Admin;
            AName.Text = Admin;

        } 
// this newname is getting the reference from another form here below
  public void FetchAdmin(string Admin)
        {
            
            label3.Text = Admin;
            adminsetter.newname(label3.Text);



        }

// the form name is adDashBoard where the value of Admin is Sucessfully displaying as Label3 as you can see above label 3 ... and this FetchAdmin is getting Reference from the AdminLogin form below:

string Admin="";
        private void admin_Click(object sender, EventArgs e)
        {
            string username = AdName.Text;
            string  password = adPass.Text;
            td=edll.adlogin(username, password);

            Admin += username; 
            ad.FetchAdmin(Admin);
         
           
            if (td.Rows.Count>0)
            {
                MessageBox.Show("Login Successfull");
                this.Hide();
              
                ad.Show();

            }
        else { MessageBox.Show("Login Failed "); }

        }

now my problem is i want to show the username into the AdSettingPanel . but im not able to do that please help me... thankyou Guys you All are Awesome!! :)

What I have tried:

what i tired i have shown all above ... i have also same achieved via Properties but i dont want to create properties. i want to achieve it via simple variables