Cross-threading access issues in Silverlight

Access across threads in Silverlight, unlike Controls.invoke in WinForm

In general, the Dispather.begininvoke is used.

But I also found that the use of asyncoperator or asynchronazationcontext can also be implemented to convert the context

The code is as follows

Page.xaml

<UserControl x:Class="SilverlightChat.Page"
　　 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
　　 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
　　Width="400" Height="300">
　　<Grid x:Name="LayoutRoot" Background="White">
　　　　 <Grid.RowDefinitions>
　　　　　　<RowDefinition Height="80" />
　　　　　 　<RowDefinition Height="80" />
　　　　</Grid.RowDefinitions>
　　　　 <TextBlock x:Name="tblTest" Text="not loaded yet" VerticalAlignment="Center" HorizontalAlignment="Center" Grid.Row="0" />
　　　　<Button x:Name="btnTest" Content="ClickMe" Height="30" Width="50" Click="btnTest_Click" Grid.Row="1" />
　　 </Grid>
</UserControl>

Page.xaml.cs

Using System.Windows.Controls;
Using System.Threading;
Using System.ComponentModel;

Namespace Silverlightchat
{
public partial class Page:usercontrol
{
Private SynchronizationContext CurrentContext;
Private AsyncOperation Asyncoper;

Public Page ()
{
InitializeComponent ();
Asyncoper = Asyncoperationmanager.createoperation (null);
This.currentcontext = synchronizationcontext.current;
}

private void btnTest_Click (object sender, System.Windows.RoutedEventArgs e)
{
Thread t = new Thread (new ThreadStart (Acrossthread));
T.start ();
}

private void Acrossthread ()
{
Asyncoper.post (Result =>
{
Tbltest.text = "haschanged";
}, NULL);
Currentcontext.post (Result =>
//{
Tbltest.text = "haschanged";
}, NULL);
}
}
}

To achieve the goal of accessing the UI across threads

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