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 1/2] 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; }
+    }
+}

From e80e413cf001bd77bec30688ae2c56c1c5aa2d6b Mon Sep 17 00:00:00 2001
From: bmello4688 <brian.mello@outlook.com>
Date: Wed, 21 Oct 2020 19:56:18 -0400
Subject: [PATCH 2/2] Add sumary and remark to class header

---
 src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs b/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs
index 0f091d540a..ad017822e4 100644
--- a/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs
+++ b/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs
@@ -2,6 +2,15 @@
 
 namespace Avalonia.Metadata
 {
+    /// <summary>
+    /// Use to predefine the prefix associated to an xml namespace in a xaml file
+    /// </summary>
+    /// <remarks>
+    /// example:
+    /// [assembly: XmlnsPrefix("https://github.com/avaloniaui", "av")]
+    /// xaml:
+    /// xmlns:av="https://github.com/avaloniaui"
+    /// </remarks>
     [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
     public sealed class XmlnsPrefixAttribute : Attribute
     {