diff --git a/build/SharedVersion.props b/build/SharedVersion.props
index d1e9f7b751..95556af160 100644
--- a/build/SharedVersion.props
+++ b/build/SharedVersion.props
@@ -20,6 +20,6 @@
   </PropertyGroup>
 
   <ItemGroup Label="PackageIcon">
-    <None Include="$(SolutionDir)/build/Assets/Icon.png" Pack="true" PackagePath=""/>
+    <None Include="$(MSBuildThisFileDirectory)/Assets/Icon.png" Pack="true" PackagePath=""/>
   </ItemGroup>
 </Project>
diff --git a/readme.md b/readme.md
index ccdbbfb967..726a634e1a 100644
--- a/readme.md
+++ b/readme.md
@@ -39,7 +39,7 @@ Examples of UIs built with Avalonia
 
 ## JetBrains Rider
 
-If you need to develop Avalonia app with JetBrains Rider, go and *vote* on [this issue](https://youtrack.jetbrains.com/issue/RIDER-39247) in their tracker. JetBrains won't do things without their users telling them that they want the feature, so only **YOU** can make it happen.
+If you need to develop Avalonia app with JetBrains Rider you can use latest Rider [preview builds](https://www.jetbrains.com/rider/nextversion/).
 
 ## Bleeding Edge Builds
 
diff --git a/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs b/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs
new file mode 100644
index 0000000000..ad017822e4
--- /dev/null
+++ b/src/Avalonia.Base/Metadata/XmlnsPrefixAttribute.cs
@@ -0,0 +1,39 @@
+using System;
+
+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
+    {
+        /// <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; }
+    }
+}