From 1aa50361bb1a27821a407a26df8f4216cdad00c4 Mon Sep 17 00:00:00 2001
From: bmello4688 <brian.mello@outlook.com>
Date: Tue, 20 Oct 2020 08:55:17 -0400
Subject: [PATCH] add XmlnsPrefix which is in WPF

---
 .../Metadata/XmlnsPrefixAttribute.cs          | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs

diff --git a/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs b/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs
new file mode 100644
index 0000000000..0f091d540a
--- /dev/null
+++ b/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs
@@ -0,0 +1,30 @@
+using System;
+
+namespace Avalonia.Metadata
+{
+    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+    public sealed class XmlnsPrefixAttribute : Attribute
+    {
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="xmlNamespace">XML namespce</param>
+        /// <param name="prefix">recommended prefix</param>
+        public XmlnsPrefixAttribute(string xmlNamespace, string prefix)
+        {
+            XmlNamespace = xmlNamespace ?? throw new ArgumentNullException(nameof(xmlNamespace));
+
+            Prefix = prefix ?? throw new ArgumentNullException(nameof(prefix));
+        }
+
+        /// <summary>
+        /// XML Namespace
+        /// </summary>
+        public string XmlNamespace { get; }
+
+        /// <summary>
+        /// New Xml Namespace
+        /// </summary>
+        public string Prefix { get; }
+    }
+}