How to convert Microsoft Graph dateTimeTimeZone to local DateTime?

In Microsoft Graph the datetime values (for example in events of outlook) are returned as an instance of DateTimeTimeZone class. This object is composed by two properties ( datetime and timezone ) that are strings, and represents a UTC date. In a UWP app, we can control how those values are displayed by using a value converter as follows:

Question: The IValueConverter Interface used in the following code is from a UWP Windows.UI.Xaml.Data Namespace. How can we achieve the same in a WPF app?

using Microsoft.Graph;
using System;

class GraphDateTimeTimeZoneConverter : Windows.UI.Xaml.Data.IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, string language)
        {
            DateTimeTimeZone date = value as DateTimeTimeZone;

            if (date != null)
            {
                // Resolve the time zone
                var timezone = TimeZoneInfo.FindSystemTimeZoneById(date.TimeZone);
                // Parse method assumes local time, which may not be the case
                var parsedDateAsLocal = DateTimeOffset.Parse(date.DateTime);
                // Determine the offset from UTC time for the specific date
                // Making this call adjusts for DST as appropriate
                var tzOffset = timezone.GetUtcOffset(parsedDateAsLocal.DateTime);
                // Create a new DateTimeOffset with the specific offset from UTC
                var correctedDate = new DateTimeOffset(parsedDateAsLocal.DateTime, tzOffset);
                // Return the local date time string
                return correctedDate.LocalDateTime.ToString();
            }

            return string.Empty;
        }

        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            throw new NotImplementedException();
        }
    }

UWP Xaml:

<Page
    x:Class="MyMSGraphProject.CalendarPage"
   ....
</Page>

<Page.Resources>
    <local:GraphDateTimeTimeZoneConverter x:Key="DateTimeTimeZoneValueConverter" />
</Page.Resources>

<Grid>
  <DataGrid x:Name="EventList" AutoGenerateColumns="False">
      <DataGrid.Columns>
         <DataGridTextColumn Header="Birth Date" Binding="{Binding BirthDate, Converter={StaticResource DateTimeTimeZoneValueConverter}}" />
      .....
      </DataGrid.Columns>
  </DataGrid>
</Grid>

Snapshot of the display of the above DataGrid: