diff --git a/src/c#/GeneralUpdate.PacketTool/MainPage.xaml b/src/c#/GeneralUpdate.PacketTool/MainPage.xaml
index 898cee6d386b67edc84855fc069dcf08155cea9b..48b692599bc8c4bb2321d8a11fefb01bf01cf2f2 100644
--- a/src/c#/GeneralUpdate.PacketTool/MainPage.xaml
+++ b/src/c#/GeneralUpdate.PacketTool/MainPage.xaml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              x:Class="GeneralUpdate.PacketTool.MainPage" Title="GeneralUpdate.PacketTool">
@@ -61,7 +61,7 @@
             </StackLayout>
             <StackLayout Margin="0,0,115,0" Grid.Row="8" Orientation="Horizontal" HeightRequest="40" HorizontalOptions="Center">
                 <Label VerticalOptions="Center"  Text="client type :" />
-                <Picker WidthRequest="400" HeightRequest="32" Margin="9,0,3,0" ItemsSource="{Binding AppTypes}" SelectedItem="{Binding CurrnetAppType}" />
+                <Picker WidthRequest="400" HeightRequest="32" Margin="9,0,3,0" ItemsSource="{Binding AppTypes}" SelectedItem="{Binding CurrentAppType}" />
             </StackLayout>
             <StackLayout Margin="0,0,110,0" Grid.Row="9" Orientation="Horizontal"  HorizontalOptions="Center">
                 <Label VerticalOptions="Center"  Text="server url :" />