C#

"[{\"id\":\"0b5a6026-d347-4f8d-94e7-eede0bda6df1\",\"identifier\":\"WPLG009569C78EDC\",\"name\":\"Schemerlamp\",\"latitude\":51.8152867,\"longitude\":4.4244634,\"devices\":[{\"id\":\"b2454863-1fb9-4e48-b314-a85c0175b238\",\"typeName\":\"plug_outlet\",\"name\":\"Schemerlamp\",\"code\":\"null\",\"iconUrl\":\"icons/15\"}],\"online\":true,\"firmwareUpdateAvailable\":false,\"deviceTypes\":[{\"name\":\"brel_lr_curtain\",\"displayName\":\"Brel Curtain\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/brel_lr_curtain.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Stop\"},{\"action\":\"Open\"},{\"action\":\"Close\"}],\"selectable\":true},{\"name\":\"brel_ud_curtain\",\"displayName\":\"Brel Roller\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/brel_ud_curtain.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Stop\"},{\"action\":\"Up\"},{\"action\":\"Down\"}],\"selectable\":true},{\"name\":\"brel_roman_pl\",\"displayName\":\"Brel Roman/Pleated/VB\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/brel_roman_pl.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Down\"},{\"action\":\"Stop\"},{\"action\":\"Up\"}],\"selectable\":true},{\"name\":\"flamingo_switch\",\"displayName\":\"Flamingo Switch\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/switch_without_button.html\",\"family\":\"Switch\",\"actions\":[{\"action\":\"Off\"},{\"action\":\"On\"}],\"selectable\":true},{\"name\":\"forest_lr_curtain\",\"displayName\":\"Forest Curtains\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/forest_curtain.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Close\"},{\"action\":\"Open\"},{\"action\":\"Stop\"}],\"selectable\":true},{\"name\":\"forest_roman_blinds_bg\",\"displayName\":\"Forest roller/roman blinds big\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/forest_roman_blinds_bg.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Stop\"},{\"action\":\"Up\"},{\"action\":\"Down\"}],\"selectable\":true},{\"name\":\"forest_roman_blinds_sm\",\"displayName\":\"Forest roman blinds small\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/forest_roman_blinds_sm.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Down\"},{\"action\":\"Up\"},{\"action\":\"Stop\"}],\"selectable\":true},{\"name\":\"hew_dimmer\",\"displayName\":\"HomeEasy Dimmer\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/dimmer.html\",\"family\":\"Dimmer\",\"actions\":[{\"action\":\"Off\"},{\"action\":\"Range\",\"range\":{\"min\":1.0,\"max\":100.0,\"step\":0.0,\"allowedValues\":[1.0,6.0,12.0,19.0,25.0,31.0,38.0,44.0,51.0,57.0,63.0,70.0,76.0,83.0,89.0,95.0,100.0]}},{\"action\":\"On\"}],\"selectable\":true},{\"name\":\"hew_switch\",\"displayName\":\"HomeEasy Switch\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/switch.html\",\"family\":\"Switch\",\"actions\":[{\"action\":\"On\"},{\"action\":\"Off\"}],\"selectable\":true},{\"name\":\"plug_outlet\",\"displayName\":\"Plug Outlet\",\"pairInformationUrl\":\"\",\"family\":\"Switch\",\"actions\":[{\"action\":\"GetState\"},{\"action\":\"Off\"},{\"action\":\"On\"}],\"selectable\":false},{\"name\":\"smartwares_dimmer\",\"displayName\":\"Smartwares Dimmer\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/dimmer.html\",\"family\":\"Dimmer\",\"actions\":[{\"action\":\"Off\"},{\"action\":\"Range\",\"range\":{\"min\":1.0,\"max\":100.0,\"step\":0.0,\"allowedValues\":[1.0,6.0,12.0,19.0,25.0,31.0,38.0,44.0,51.0,57.0,63.0,70.0,76.0,83.0,89.0,95.0,100.0]}},{\"action\":\"On\"}],\"selectable\":true},{\"name\":\"smartwares_rv\",\"displayName\":\"Smartwares Radiator Valve\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/smartwares_rv.html\",\"family\":\"Thermostat\",\"actions\":[{\"action\":\"Range\",\"range\":{\"min\":5.0,\"max\":28.0,\"step\":0.5,\"allowedValues\":[]}},{\"action\":\"DayMode\"},{\"action\":\"NightMode\"}],\"selectable\":true},{\"name\":\"smartwares_switch\",\"displayName\":\"Smartwares Switch\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/switch.html\",\"family\":\"Switch\",\"actions\":[{\"action\":\"Off\"},{\"action\":\"On\"}],\"selectable\":true},{\"name\":\"smartwares_ud_switch\",\"displayName\":\"Smartwares Up/Down Switch\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/smartwares_ud_switch.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Up\"},{\"action\":\"Down\"}],\"selectable\":true},{\"name\":\"vako_blinds\",\"displayName\":\"Vako Blinds\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/vako_blinds.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Down\"},{\"action\":\"Stop\"},{\"action\":\"Up\"}],\"selectable\":true},{\"name\":\"vako_lr_curtain\",\"displayName\":\"Vako Curtain Track\",\"pairInformationUrl\":\"http://static.homewizard.net/media/lite/en/instructions/vako_lr_curtain.html\",\"family\":\"Curtain\",\"actions\":[{\"action\":\"Left\"},{\"action\":\"Stop\"},{\"action\":\"Right\"}],\"selectable\":true}],\"timeZone\":\"Europe/Amsterdam\"}]"

<_TestSettingsBase xsi:type="BeadBeatingMotorSettings">
<TestName>Bead Beating</TestName>
<TestType>BeadBeating</TestType>
<BeadBeaterMax>
  <Caption>Bead Beater Max</Caption>
  <Description>Bead Beater maximum</Description>
  <CurrentValue>
    <Value>1</Value>
    <Value1>1</Value1>
  </CurrentValue>
  <DefaultValue>
    <Value>1</Value>
    <Value1>1</Value1>
  </DefaultValue>
  <ValueMax>
    <Value>0</Value>
    <Value1>0</Value1>
  </ValueMax>
  <ValueMin>
    <Value>100</Value>
    <Value1>100</Value1>
  </ValueMin>
</BeadBeaterMax>
<BeadBeaterMin>
  <Caption>Bead Beater Min</Caption>
  <Description>Bead Beater minimum</Description>
  <CurrentValue>
    <Value>0.075</Value>
    <Value1>0.075</Value1>
  </CurrentValue>
  <DefaultValue>
    <Value>0.075</Value>
    <Value1>0.075</Value1>
  </DefaultValue>
  <ValueMax>
    <Value>101</Value>
    <Value1>101</Value1>
  </ValueMax>
  <ValueMin>
    <Value>999</Value>
    <Value1>999</Value1>
  </ValueMin>
</BeadBeaterMin>
</_TestSettingsBase>

[Serializable]
public class _TestSettingsBase
{
    public string TestName { get; set; }

    public TestType TestType { get; set; }
}

[Serializable]
public class BeadBeatingMotorSettings : _TestSettingsBase
{
    [ShowInPropertySheet()]
    public Setting BeadBeaterMax { get; set; }

    [ShowInPropertySheet()]
    public Setting BeadBeaterMin { get; set; }

    // CTOR
    public BeadBeatingMotorSettings()
    {
        TestType = TestType.BeadBeating;

        BeadBeaterMax = new Setting
        {
            Caption = "Bead Beater Max",
            CurrentValue = 1,
            DefaultValue = 1,
            Description = "Bead Beater maximum",
            ValueMax = 0,
            ValueMin = 100
        };

        BeadBeaterMin = new Setting
        {
            Caption = "Bead Beater Min",
            CurrentValue = 0.075,
            DefaultValue = 0.075,
            Description = "Bead Beater minimum",
            ValueMax = 101,
            ValueMin = 999
        };
    }
}

[Serializable]
public class Setting : _EntityBase
{
    public string Caption { get; set; }

    public string Description { get; set; }

    public MyProp CurrentValue { get; set; }

    public MyProp DefaultValue { get; set; }

    public MyProp ValueMax { get; set; }

    public MyProp ValueMin { get; set; }
}

public class MyProp
{
    private T _value;
    public T Value
    {
        get { return Value1; }
        set { Value1 = value; }
    }

    public T Value1 { get => _value; set => _value = value; }

    public static implicit operator T(MyProp value)
    {
        return value.Value;
    }

    public static implicit operator MyProp(T value)
    {
        return new MyProp { Value = value };
    }
}

<UserControl x:Class="PropSheet.PropertyViews.DoublePropertyView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="100" 
             d:DesignWidth="100">

    <TextBox Text="{Binding SettingValue}"/>

</UserControl>

private void LoadProperties()
{
    Properties = new List<PropertyModel>();

    // Get a list of PropertyInfos for each property on the setting marked with ShowInPropertySheetAttribute(true)
    var propertyInfos = from pi in Setting.GetType().GetProperties()
                        let attrs = pi.GetCustomAttributes(typeof(ShowInPropertySheetAttribute), true)
                        where attrs.Length != 0 &&
                        (bool)Helpers.GetAttributeValue(Setting.GetType(), pi.Name, typeof(ShowInPropertySheetAttribute), "IsVisible")
                        select pi;

    foreach (PropertyInfo propertyInfo in propertyInfos)
    {
        // THE PROBLEM IS HERE. I WON"T KNOW WHAT THE TYPE THE SETTING IS AT 
        // RUNTIME. EVEN THOUGH I HAVE "DOUBLE" HARDCODED HERE, I NEED TO GET 
        // THE TYPE FROM THE <T>  SET ON EACH OF THE PROPERTIES
        // MARKED WITH ShowInPropertySheet<br />
        var settingProperty = (Setting<double>)propertyInfo.GetValue(Setting);

        var current = settingProperty.CurrentValue;

        var model = new PropertyModel(propertyInfo.Name, current.Value);

        Properties.Add(model);
    }
}

button (Add, Delete, Shearch) with UserControle and saved entity framworks