TextBox with Placeholder

ActionWithoutTextChanged(delegate															 {																 // If the Text is empty, insert placeholder and set cursor to to first position
																	 if (String.IsNullOrEmpty(this.Text))
																	 {
																		 Reset();
																		 return;
																	 }

																	 // If the placeholder is active, revert state to a usual TextBox
																	 if (this.IsPlaceholderActive)
																	 {
																		 this.IsPlaceholderActive = false;

																		 // Throw away the placeholder but leave the new typed char
																	 this.Text = this.Text.Replace(this.PlaceholderText, String.Empty);

																		 // Set Selection to last position
																		 this.Select(this.TextLength, 0);
																	 }
																 });

ActionWithoutTextChanged(delegate
																 {
																	 // If the Text is empty, insert placeholder and set cursor to to first position
																	 if (String.IsNullOrEmpty(this.Text))
																	 {
																		 Reset();
																		 return;
																	 }

																	 // If the placeholder is active, revert state to a usual TextBox
																	 if (this.IsPlaceholderActive)
																	 {
																		 this.IsPlaceholderActive = false;

																		 // Throw away the placeholder but leave the new typed char
if(this.PlaceholderText != @"")															 this.Text = this.Text.Replace(this.PlaceholderText, String.Empty);

																		 // Set Selection to last position
																		 this.Select(this.TextLength, 0);
																	 }
																 });

protected override void OnKeyDown(KeyEventArgs e)
		{
			// Prevents that the user can go through the placeholder with arrow keys
			if (IsPlaceholderActive && (e.KeyCode == Keys.Left || e.KeyCode == Keys.Right || e.KeyCode == Keys.Up || e.KeyCode == Keys.Down))
				e.Handled = true;

            base.OnKeyDown(e);
		}

protected override void OnKeyDown(KeyEventArgs e)
{
    // Prevents that the user can go through the placeholder with arrow keys
    if (IsPlaceholderActive && (e.KeyCode == Keys.Left || e.KeyCode == Keys.Right || e.KeyCode == Keys.Up || e.KeyCode == Keys.Down))
        e.Handled = true;
    if (IsPlaceholderActive && e.KeyCode == Keys.Delete)
        e.Handled = true;

    base.OnKeyDown(e);
}