Disable IME on the text box for inputing the symbol.

Author: ArvinZJC

ShSzStockHelper/HomeWindow.xaml

@@ -2,6 +2,7 @@
                              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+                             xmlns:input="clr-namespace:System.Windows.Input;assembly=PresentationCore"
                              xmlns:Property="clr-namespace:ShSzStockHelper.Properties"
                              xmlns:Syncfusion="http://schemas.syncfusion.com/wpf"
                              xmlns:SyncfusionSkin="clr-namespace:Syncfusion.SfSkinManager;assembly=Syncfusion.SfSkinManager.WPF"
@@ -57,6 +58,7 @@
 
                 <Border Grid.Column="0" Background="Transparent">
                     <Syncfusion:SfTextBoxExt x:Name="textBoxSymbol"
+                                             input:InputMethod.IsInputMethodEnabled="False"
                                              TextChanged="TextBoxSymbol_TextChanged"
                                              Watermark="{x:Static Property:Resources.TextBoxSymbol_WaterMark}"
                                              WatermarkTemplate="{StaticResource TextBoxWatermarkTemplate}"