I have two property FirstName and LastName and bound to a textblock using Multibinidng and converter to display the FullName as FirstName + Last Name.

FirstName="Kishore" LastName="Kumar"

In the Converter I changed the LastName as "Changed Text"

values[1] = "Changed Text";

After executing the Converter my TextBlock will show "Kishore Changed Text" but Dependency property LastName is still have the last value "Kumar". Why I am not getting the "Changed Text" value in the LastName property after the execution?.

Will the change made at converter will notify the bound property?

 <Window.Resources>
    <local:NameConverter x:Key="NameConverter"></local:NameConverter>
</Window.Resources>
<Grid>
    <TextBlock>
        <TextBlock.Text>
            <MultiBinding Converter="{StaticResource NameConverter}">
                <Binding Path="FirstName"></Binding>
                <Binding Path="LastName"></Binding>
            </MultiBinding>
        </TextBlock.Text>
    </TextBlock>
 </Grid>

Converter:

 public class NameConverter:IMultiValueConverter
{
    #region IMultiValueConverter Members

    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        values[1] = "Changed Text";
        return values[0].ToString() + " " + values[1].ToString();
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }

    #endregion
}