1 files changed, 110 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core/Size.cs b/Xamarin.Forms.Core/Size.cs
new file mode 100644
index 00000000..4e709a10
--- /dev/null
+++ b/Xamarin.Forms.Core/Size.cs
@@ -0,0 +1,110 @@
+using System;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Globalization;
+
+namespace Xamarin.Forms
+{
+	[DebuggerDisplay("Width={Width}, Height={Height}")]
+	public struct Size
+	{
+		double _width;
+		double _height;
+
+		public static readonly Size Zero;
+
+		public Size(double width, double height)
+		{
+			if (double.IsNaN(width))
+				throw new ArgumentException("NaN is not a valid value for width");
+			if (double.IsNaN(height))
+				throw new ArgumentException("NaN is not a valid value for height");
+			_width = width;
+			_height = height;
+		}
+
+		public bool IsZero
+		{
+			get { return (_width == 0) && (_height == 0); }
+		}
+
+		[DefaultValue(0d)]
+		public double Width
+		{
+			get { return _width; }
+			set
+			{
+				if (double.IsNaN(value))
+					throw new ArgumentException("NaN is not a valid value for Width");
+				_width = value;
+			}
+		}
+
+		[DefaultValue(0d)]
+		public double Height
+		{
+			get { return _height; }
+			set
+			{
+				if (double.IsNaN(value))
+					throw new ArgumentException("NaN is not a valid value for Height");
+				_height = value;
+			}
+		}
+
+		public static Size operator +(Size s1, Size s2)
+		{
+			return new Size(s1._width + s2._width, s1._height + s2._height);
+		}
+
+		public static Size operator -(Size s1, Size s2)
+		{
+			return new Size(s1._width - s2._width, s1._height - s2._height);
+		}
+
+		public static Size operator *(Size s1, double value)
+		{
+			return new Size(s1._width * value, s1._height * value);
+		}
+
+		public static bool operator ==(Size s1, Size s2)
+		{
+			return (s1._width == s2._width) && (s1._height == s2._height);
+		}
+
+		public static bool operator !=(Size s1, Size s2)
+		{
+			return (s1._width != s2._width) || (s1._height != s2._height);
+		}
+
+		public static explicit operator Point(Size size)
+		{
+			return new Point(size.Width, size.Height);
+		}
+
+		public bool Equals(Size other)
+		{
+			return _width.Equals(other._width) && _height.Equals(other._height);
+		}
+
+		public override bool Equals(object obj)
+		{
+			if (ReferenceEquals(null, obj))
+				return false;
+			return obj is Size && Equals((Size)obj);
+		}
+
+		public override int GetHashCode()
+		{
+			unchecked
+			{
+				return (_width.GetHashCode() * 397) ^ _height.GetHashCode();
+			}
+		}
+
+		public override string ToString()
+		{
+			return string.Format("{{Width={0} Height={1}}}", _width.ToString(CultureInfo.InvariantCulture), _height.ToString(CultureInfo.InvariantCulture));
+		}
+	}
+}
+\ No newline at end of file