修复一些bug；

Author: panwenbo

One.Toolbox/One.Toolbox.csproj

@@ -9,7 +9,7 @@
 	<SelfContained>false</SelfContained>
     <UseWPF>true</UseWPF>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
-	<Version>2.8.0</Version>
+	<Version>2.8.1</Version>
 	<ImplicitUsings>enable</ImplicitUsings>
 	<SatelliteResourceLanguages>zh-Hans;en-us</SatelliteResourceLanguages>
 	<ApplicationIcon>Icon.ico</ApplicationIcon>

One.Toolbox/ViewModels/NetSpeed/NetSpeedPageVM.cs

@@ -54,6 +54,10 @@ public NetSpeedPageVM()
 
         LoadSetting();
         NetSpeedSelectItemVM = NetSpeedItems.FirstOrDefault(i => i.InterfaceName == LastAdapterName);
+        if (NetSpeedSelectItemVM == null)
+        {
+            NetSpeedSelectItemVM = NetSpeedItems.FirstOrDefault();
+        }
         NetSpeedSelectItemVM.SpeedAction += NetSpeedPlot.OnSpeedChange;
 
         if (ShowSmallWnd)

One.Toolbox/Views/Settings/SettingsPage.xaml

@@ -8,7 +8,7 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:myuc="clr-namespace:One.Toolbox.MyUserControl"
              xmlns:vms="clr-namespace:One.Toolbox.ViewModels.Setting"
-             d:DataContext="{d:DesignInstance Type=vms:SettingsVM}"
+             d:DataContext="{d:DesignInstance Type=vms:SettingsPageVM}"
              d:Height="548"
              d:Width="733"
              mc:Ignorable="d">