Override text property of textbox

hi
thanks a lot
i want this code in wpf:

 public override string Text
        {
            get { return Text.Replace(",", ""); }
            set { Text = value; }
        }

thanks for your guide .

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Thanks Advance...

thanks for your suggestion but the proposed code doesn't run and i receive error in this section:
public string Text
{
  get
  {
  return (string) base.GetValue(TextProperty);
  }
  set
  {
  base.SetValue(TextProperty, value);
  }
}

thanks for your guide .

TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(TextBox), new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.Journal | FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback(TextBox.OnTextPropertyChanged), new CoerceValueCallback(TextBox.CoerceText), true, UpdateSourceTrigger.LostFocus));

Notice that the DependencyProperty also registers a PropertyChangedCallback for what you are trying to do.

This is how the Text property is implemented in the TextBox class:

public string Text
{
    get
    {
        return (string) base.GetValue(TextProperty);
    }
    set
    {
        base.SetValue(TextProperty, value);
    }
}