add vector parse

src/Avalonia.Visuals/Vector.cs

@@ -4,6 +4,7 @@
 using System;
 using System.Globalization;
 using Avalonia.Animation.Animators;
+using Avalonia.Utilities;
 using JetBrains.Annotations;
 
 namespace Avalonia
@@ -85,6 +86,22 @@ namespace Avalonia
         public static Vector operator /(Vector vector, double scale)
             => Divide(vector, scale);
 
+        /// <summary>
+        /// Parses a <see cref="Vector"/> string.
+        /// </summary>
+        /// <param name="s">The string.</param>
+        /// <returns>The <see cref="Vector"/>.</returns>
+        public static Vector Parse(string s)
+        {
+            using (var tokenizer = new StringTokenizer(s, CultureInfo.InvariantCulture, exceptionMessage: "Invalid Vector."))
+            {
+                return new Vector(
+                    tokenizer.ReadDouble(),
+                    tokenizer.ReadDouble()
+                );
+            }
+        }
+
         /// <summary>
         /// Length of the vector
         /// </summary>
@@ -166,9 +183,9 @@ namespace Avalonia
         }
 
         /// <summary>
-        /// Returns the string representation of the point.
+        /// Returns the string representation of the vector.
         /// </summary>
-        /// <returns>The string representation of the point.</returns>
+        /// <returns>The string representation of the vector.</returns>
         public override string ToString()
         {
             return string.Format(CultureInfo.InvariantCulture, "{0}, {1}", _x, _y);