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using System;
using IronPython.Hosting;

namespace ConsoleSample
{
    class Program
    {
        static void Main(string[] args)
        {
            var engine = Python.CreateEngine();

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private static Random random = new Random();
public static string RandomString(int length)
{
    const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    return new string(Enumerable.Repeat(chars, length)
      .Select(s => s[random.Next(s.Length)]).ToArray());
}

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    function isIe() {
        var ua = navigator.userAgent;
        var is_ie = ua.indexOf("MSIE ") > -1 || ua.indexOf("Trident/") > -1;
        return is_ie;
    };

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public sealed class TaskNotifyObserver<TResult> : INotifyPropertyChanged
    {
        public TaskNotifyObserver(Task<TResult> task)
        {
            Task = task;
            if (!task.IsCompleted)
            {
                var _ = WatchTaskAsync(task);
            }
        }

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    <ControlTemplate x:Key="ValidationTemplate">
        <Grid>
            <Border BorderBrush="#FFCB2E2E" BorderThickness="1" Background="#11FF0000" IsHitTestVisible="False" x:Name="errorBorder"/>
            <AdornedElementPlaceholder x:Name="placeholder" />
            <Popup AllowsTransparency="True" HorizontalAlignment="Right" HorizontalOffset="0" VerticalOffset="0" PopupAnimation="Fade" Placement="Right" 
                   PlacementTarget="{Binding ElementName=errorBorder}" IsOpen="{Binding ElementName=placeholder, Path=AdornedElement.IsFocused, Mode=OneWay}">
                <StackPanel Orientation="Horizontal">
                    <Border Background="#FFCB2E2E" CornerRadius="4" Padding="4">
                        <TextBlock HorizontalAlignment="Center" Foreground="White" FontWeight="Bold" Margin="2,0,0,0"
                                   Text="{Binding ErrorContent}" />

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public class ReverseBooleanToVisibilityConverter : IValueConverter
    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            var b = (bool)value;
            if (b)
            {
                return Visibility.Collapsed;
            }

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  <DataGrid.RowStyle>
                <Style TargetType="DataGridRow">
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding CultureId}" Value="-1">
                            <Setter Property="IsEnabled" Value="False"/>
                        </DataTrigger>
                        <MultiDataTrigger>
                            <MultiDataTrigger.Conditions>
                                <Condition Binding="{Binding}" Value="{x:Static CollectionView.NewItemPlaceholder}" />
                                <Condition Binding="{Binding RelativeSource={RelativeSource Mode=Self},  Path=IsSelected}" Value="False" />

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public class BindableSelectedItemBehavior : Behavior<TreeView>
    {
        #region SelectedItem Property

        public object SelectedItem
        {
            get { return (object)GetValue(SelectedItemProperty); }
            set { SetValue(SelectedItemProperty, value); }
        }