ช่วยบอกวิธีการใช้DateTimePickerหน่อยคับ มีปัญหาเวลาใช้คำสั่่ง .removeอะคับช่วยบอกหน่อยนะคับ

Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        TextBox5.Text = TextBox1.Text.ToString() & TextBox2.Text.ToString().Remove(2, 2) & TextBox3.Text.ToString().Remove(0, 1).Remove(2, 1) & DateTimePicker1.Value.ToString().Remove(0, 3).Remove(2, 14)
    End Sub

    Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox2.TextChanged
        If IsNumeric(TextBox2.Text) = False Then
            If TextBox2.Text.Length = 0 Then
                TextBox2.ResetText()
                Exit Sub
            End If
            TextBox2.Text = TextBox2.Text.Remove(TextBox2.Text.Length - 1, 1)
            TextBox2.SelectionStart = TextBox2.Text.Length
        End If

    End Sub