diff --git a/src/Avalonia.Animation/Avalonia.Animation.csproj b/src/Avalonia.Animation/Avalonia.Animation.csproj
index bafac2b261..2101c5669d 100644
--- a/src/Avalonia.Animation/Avalonia.Animation.csproj
+++ b/src/Avalonia.Animation/Avalonia.Animation.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Animation.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Animation.xml</DocumentationFile>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -21,7 +21,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Animation.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Animation.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.Base/Avalonia.Base.csproj b/src/Avalonia.Base/Avalonia.Base.csproj
index 58c510f483..54537841a9 100644
--- a/src/Avalonia.Base/Avalonia.Base.csproj
+++ b/src/Avalonia.Base/Avalonia.Base.csproj
@@ -12,7 +12,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Base.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Base.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -22,7 +22,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Base.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Base.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.Controls/Avalonia.Controls.csproj b/src/Avalonia.Controls/Avalonia.Controls.csproj
index c8f6b4e65a..997e15050f 100644
--- a/src/Avalonia.Controls/Avalonia.Controls.csproj
+++ b/src/Avalonia.Controls/Avalonia.Controls.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Controls.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Controls.xml</DocumentationFile>
     <NoWarn>CS1591;CS0067</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -21,7 +21,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Controls.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Controls.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj b/src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj
index abbdd15bed..5f8e25269b 100644
--- a/src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj
+++ b/src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>TRACE;DEBUG</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Diagnostics.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Diagnostics.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -21,7 +21,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Diagnostics.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Diagnostics.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.DotNetCoreRuntime/Avalonia.DotNetCoreRuntime.csproj b/src/Avalonia.DotNetCoreRuntime/Avalonia.DotNetCoreRuntime.csproj
index 53b2c997d0..8630e7b228 100644
--- a/src/Avalonia.DotNetCoreRuntime/Avalonia.DotNetCoreRuntime.csproj
+++ b/src/Avalonia.DotNetCoreRuntime/Avalonia.DotNetCoreRuntime.csproj
@@ -5,7 +5,7 @@
     <DefineConstants>$(DefineConstants);DOTNETCORE</DefineConstants>
   </PropertyGroup>
   <PropertyGroup>
-    <DocumentationFile>bin\$(Configuration)\Avalonia.DotNetCoreRuntime.XML</DocumentationFile>
+    <DocumentationFile>bin\$(Configuration)\Avalonia.DotNetCoreRuntime.xml</DocumentationFile>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="..\Shared\SharedAssemblyInfo.cs">
diff --git a/src/Avalonia.Input/Avalonia.Input.csproj b/src/Avalonia.Input/Avalonia.Input.csproj
index 901f7b5675..c82601ac2c 100644
--- a/src/Avalonia.Input/Avalonia.Input.csproj
+++ b/src/Avalonia.Input/Avalonia.Input.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Input.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Input.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -21,7 +21,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Input.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Input.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.Interactivity/Avalonia.Interactivity.csproj b/src/Avalonia.Interactivity/Avalonia.Interactivity.csproj
index d683c77468..4f6f9ad6fe 100644
--- a/src/Avalonia.Interactivity/Avalonia.Interactivity.csproj
+++ b/src/Avalonia.Interactivity/Avalonia.Interactivity.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Interactivity.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Interactivity.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -21,7 +21,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Interactivity.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Interactivity.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.Layout/Avalonia.Layout.csproj b/src/Avalonia.Layout/Avalonia.Layout.csproj
index 810a985e36..58c18921f5 100644
--- a/src/Avalonia.Layout/Avalonia.Layout.csproj
+++ b/src/Avalonia.Layout/Avalonia.Layout.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Layout.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Layout.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -21,7 +21,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Layout.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Layout.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.Logging.Serilog/Avalonia.Logging.Serilog.csproj b/src/Avalonia.Logging.Serilog/Avalonia.Logging.Serilog.csproj
index 5aa2cd67ba..4d9d141d0d 100644
--- a/src/Avalonia.Logging.Serilog/Avalonia.Logging.Serilog.csproj
+++ b/src/Avalonia.Logging.Serilog/Avalonia.Logging.Serilog.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Logging.Serilog.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Logging.Serilog.xml</DocumentationFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
     <DebugType>pdbonly</DebugType>
@@ -20,7 +20,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Logging.Serilog.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Logging.Serilog.xml</DocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
diff --git a/src/Avalonia.Styling/Avalonia.Styling.csproj b/src/Avalonia.Styling/Avalonia.Styling.csproj
index 6c0b957bf4..b8083b52db 100644
--- a/src/Avalonia.Styling/Avalonia.Styling.csproj
+++ b/src/Avalonia.Styling/Avalonia.Styling.csproj
@@ -12,7 +12,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Styling.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Styling.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -22,7 +22,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Styling.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Styling.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj b/src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj
index b4b200834b..d8260226e9 100644
--- a/src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj
+++ b/src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Themes.Default.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Themes.Default.xml</DocumentationFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
     <DebugType>pdbonly</DebugType>
@@ -20,7 +20,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Themes.Default.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Themes.Default.xml</DocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
diff --git a/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj b/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
index a1db5c2915..cf6afbe620 100644
--- a/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
+++ b/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
@@ -22,7 +22,7 @@
     <DefineConstants>NETSTANDARD1_3;PCL;NETSTANDARD</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Markup.Xaml.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Markup.Xaml.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
     <ItemGroup>
diff --git a/src/Markup/Avalonia.Markup/Avalonia.Markup.csproj b/src/Markup/Avalonia.Markup/Avalonia.Markup.csproj
index 57552f852c..a6d3c3336f 100644
--- a/src/Markup/Avalonia.Markup/Avalonia.Markup.csproj
+++ b/src/Markup/Avalonia.Markup/Avalonia.Markup.csproj
@@ -11,7 +11,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Markup.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Markup.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
@@ -21,7 +21,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Markup.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Markup.xml</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Windows/Avalonia.Win32/Avalonia.Win32.csproj b/src/Windows/Avalonia.Win32/Avalonia.Win32.csproj
index b2b42877b7..92d973238e 100644
--- a/src/Windows/Avalonia.Win32/Avalonia.Win32.csproj
+++ b/src/Windows/Avalonia.Win32/Avalonia.Win32.csproj
@@ -22,7 +22,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Win32.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Win32.xml</DocumentationFile>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
@@ -33,7 +33,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Win32.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Win32.xml</DocumentationFile>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>