C#

Remove		Removes the first occurrence of a specific object from the List<T>.
RemoveAll	Removes all the elements that match the conditions defined by the specified predicate.
RemoveAt	Removes the element at the specified index of the List<T>.
RemoveRange	Removes a range of elements from the List<T>.

this.Text = finger_print.Value();

using (var command2 = new OleDbCommand())
{
    command2.Connection = connection;
    command2.CommandText = "update EmployeeData set DayStatus = ? where EID = ?";
    command2.Parameters.AddWithValue("@DayStatus", a);
    
    OleDbParameter pEID = command2.Parameters.Add("@EID", OleDbType.VarChar);
    while (reader.Read())
    {
        pEID.Value = reader["EID"];
        command2.ExecuteNonQuery();
    }
}

using (var command = new OleDbCommand())
{
    command.Connection = connection;
    command.CommandText = "update EmployeeData set DayStatus = ? where Date = ?";
    command.Parameters.AddWithValue("@DayStatus", a);
    command.Parameters.AddWithValue("@Date", theFilteredDate);
    command.ExecuteNonQuery();
}

// in the main form (Form1)

// create a new instance of the secondary form
private Form2 theForm2 = new Form2();

private void Form1_Load(object sender, EventArgs e)
{
    // assign an anonymous method to the ChangeLabels Action field of the secondary form
    theForm2.ChangeLabels = delegate(string s1, string s2, string s3)
    {
        // update the labels
        label1.Text = s1;
        label2.Text = s2;
        label3.Text = s3;
    };

    // expose the secondary form
    theForm2.Show();
}

// in the secondary form (Form2)

// a template for a method that takes three string parameters and returns void
public Action<string, string, string> ChangeLabels;

// a button in the secondary form that will call the method
// injected into the secondary form by its creator, the main form
private void TestChangeForm1Labels_Click(object sender, EventArgs e)
{
    // test
    ChangeLabels("1", "2", "3");
}

// in LocationChange (aka Form2)
        private string _holdSecLoc;
        private string _holdTeam;
        private string _holdUname;

// a bunch of other form code here...

        // a template for a method that takes three string parameters and returns void
        public Action<string, string, string> ChangeLabels;

        private void ChgLoc()
            {
            GetPrimeLocBal.UidDal = Login.PassUserIdText;
            GetPrimeLocBal.NewLoc = tbLocId.Text;
            }

        private void btnChange_Click( object sender, EventArgs e )
            {
            // a button in the secondary form that will call the method
            // injected into the secondary form by its creator, the main form
            ChgLoc();
            GetPrimeLocBal.GetPrime();
            _holdUname = GetPrimeLocBal.UidDal;
            _holdTeam = GetPrimeLocBal.TeamName;
            _holdSecLoc = GetPrimeLocBal.SecondaryLoc;
            ChangeLabels( _holdUname, _holdTeam, _holdSecLoc );
            Close();
            }

// added this to private void MainDesktop_Load( object sender, EventArgs e )

            _locChgChange.ChangeLabels = delegate( string s1, string s2, string s3 )
            {
                // update the labels
                tssUserId.Text = s1;
                tssTeam.Text = s2;
                tssPrimeLoc.Text = s3;
            };

// instead of showing the form2 in the load...

        private void changeSitesToolStripMenuItem_Click( object sender, EventArgs e )
            {
            // expose the secondary form
            _locChgChange.Show();
            }