1 files changed, 140 insertions, 0 deletions
diff --git a/Xamarin.Forms.Xaml.UnitTests/Issues/Bz45299.xaml.cs b/Xamarin.Forms.Xaml.UnitTests/Issues/Bz45299.xaml.cs
new file mode 100644
index 00000000..791e870f
--- /dev/null
+++ b/Xamarin.Forms.Xaml.UnitTests/Issues/Bz45299.xaml.cs
@@ -0,0 +1,140 @@
+using System;
+using System.Collections.Generic;
+using NUnit.Framework;
+using Xamarin.Forms;
+using Xamarin.Forms.Core.UnitTests;
+
+namespace Xamarin.Forms.Xaml.UnitTests
+{
+	public class Bz45299Control : ContentView
+	{
+		public static readonly BindableProperty PortraitLayoutProperty =
+		   BindableProperty.Create(nameof(PortraitLayout), typeof(Bz45299OrientationLayout), typeof(Bz45299Control));
+		public Bz45299OrientationLayout PortraitLayout {
+			get { return (Bz45299OrientationLayout)GetValue(PortraitLayoutProperty); }
+			set { this.SetValue(PortraitLayoutProperty, value); }
+		}
+
+	}
+
+	public class Bz45299OrientationLayout : BindableObject
+	{
+		public static readonly BindableProperty SizeProperty =
+		   BindableProperty.Create(nameof(Size), typeof(Bz45299UISize), typeof(Bz45299OrientationLayout), Bz45299UISize.Zero);
+		public Bz45299UISize Size {
+			get { return (Bz45299UISize)GetValue(SizeProperty); }
+			set { SetValue(SizeProperty, value); }
+		}
+
+		public static readonly BindableProperty SpacingProperty =
+		   BindableProperty.Create(nameof(Spacing), typeof(Bz45299UILength), typeof(Bz45299OrientationLayout), Bz45299UILength.Zero);
+		public Bz45299UILength Spacing {
+			get { return (Bz45299UILength)GetValue(SpacingProperty); }
+			set { SetValue(SpacingProperty, value); }
+		}
+
+		public static readonly BindableProperty CountProperty =
+		   BindableProperty.Create(nameof(Count), typeof(int), typeof(Bz45299OrientationLayout), 1);
+		public int Count {
+			get { return (int)GetValue(CountProperty); }
+			set { SetValue(CountProperty, value); }
+		}
+	}
+
+	[TypeConverter(typeof(Bz45299UILengthTypeConverter))]
+	public class Bz45299UILength
+	{
+		public static Bz45299UILength Zero => new Bz45299UILength { Value = 0 };
+
+		public double Value { get; set; }
+
+		public static implicit operator string(Bz45299UILength uiLength) => uiLength.Value.ToString();
+		public static implicit operator double(Bz45299UILength uiLength) => uiLength.Value;
+
+		public static implicit operator Bz45299UILength(string value) => Zero;
+		public static implicit operator Bz45299UILength(long value) => Zero;
+		public static implicit operator Bz45299UILength(ulong value) => Zero;
+		public static implicit operator Bz45299UILength(int value) => Zero;
+		public static implicit operator Bz45299UILength(uint value) => Zero;
+		public static implicit operator Bz45299UILength(double value) => Zero;
+		public static implicit operator Bz45299UILength(float value) => Zero;
+	}
+
+	public class Bz45299UILengthTypeConverter : TypeConverter
+	{
+		static readonly Type StringType = typeof(string);
+		public override bool CanConvertFrom(Type sourceType)
+		{
+			if (sourceType != StringType)
+				return false;
+
+			return true;
+		}
+
+		public override object ConvertFromInvariantString(string value) => Bz45299UILength.Zero;
+	}
+
+	[TypeConverter(typeof(Bz45299UISizeTypeConverter))]
+	public class Bz45299UISize
+	{
+		public static Bz45299UISize Zero => new Bz45299UISize { Width = 0, Height = 0 };
+
+		public Bz45299UILength Width { get; set; }
+		public Bz45299UILength Height { get; set; }
+
+		public static implicit operator Bz45299UISize(string value) => Zero;
+		public static implicit operator Size(Bz45299UISize uiSize) => new Size(uiSize.Width, uiSize.Height);
+		public static implicit operator Bz45299UISize(Size size) => new Bz45299UISize { Width = size.Width, Height = size.Height };
+	}
+
+	public class Bz45299UISizeTypeConverter : TypeConverter
+	{
+		private static readonly Type StringType = typeof(string);
+
+		public override bool CanConvertFrom(Type sourceType)
+		{
+			if (sourceType != StringType)
+				return false;
+
+			return true;
+		}
+
+		public override object ConvertFromInvariantString(string value) => Bz45299UISize.Zero;
+	}
+
+	public partial class Bz45299 : ContentPage
+	{
+		public Bz45299()
+		{
+			InitializeComponent();
+		}
+		public Bz45299(bool useCompiledXaml)
+		{
+			//this stub will be replaced at compile time
+		}
+
+		[TestFixture]
+		class Tests
+		{
+			[SetUp]
+			public void Setup()
+			{
+				Device.PlatformServices = new MockPlatformServices();
+			}
+
+			[TearDown]
+			public void TearDown()
+			{
+				Device.PlatformServices = null;
+			}
+
+			[TestCase(true)]
+			[TestCase(false)]
+			public void XamlCCustomTypeConverter(bool useCompiledXaml)
+			{
+				var p = new Bz45299(useCompiledXaml);
+				Assert.AreEqual(0d, p.ctrl.PortraitLayout.Spacing.Value);
+			}
+		}
+	}
+}
+\ No newline at end of file