WPF Form Designer Prototype (MVVM)

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using XMLStudio_IDE.WPFControlUtils;
using XMLStudio_IDE.WPFControlUtils.WPFPropertyGridProxies;

namespace XMLStudio_IDE.Converters
{
    public class WPFPropertyGridProxyConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is TextBox)
                return new TextBoxProxy(value as TextBox);
            
            if (value is Label)
                return new LabelProxy(value as Label);

            if (value is CheckBox)
                return new CheckBoxProxy(value as CheckBox);

            if (value is DatePicker)
                return new DatePickerProxy(value as DatePicker);

            if (value is ComboBox)
                return new ComboBoxProxy(value as ComboBox);

            if (value is Expander)
                return new ExpanderProxy(value as Expander);

            if (value is RadioButton)
                return new RadioButtonProxy(value as RadioButton);

            if (value is ListView)
                return new ListViewProxy(value as ListView);

            if (value is Choice)
                return new ChoiceProxy(value as Choice);

            if (value is GroupBox)
                return new GroupBoxProxy(value as GroupBox);

            if (value is CloseButton || value is GroupMembersButton)
            {
                Button btn = UIHelper.FindFirstChild<Button>(value as DependencyObject, false);
                if (btn != null)
                {
                    return new ButtonProxy(btn);
                }
            }

            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}