diff --git a/lib/linguist/heuristics.rb b/lib/linguist/heuristics.rb
index b14d841b..e38b7475 100644
--- a/lib/linguist/heuristics.rb
+++ b/lib/linguist/heuristics.rb
@@ -86,6 +86,14 @@ module Linguist
       end
     end
 
+    disambiguate ".builds" do |data|
+      if /^(\s*)(<Project|<Import|<Property|<?xml|xmlns)/i.match(data)
+        Language["XML"]
+      else
+        Language["Text"]
+      end
+    end
+
     disambiguate ".ch" do |data|
       if /^\s*#\s*(if|ifdef|ifndef|define|command|xcommand|translate|xtranslate|include|pragma|undef)\b/i.match(data)
         Language["xBase"]
diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index b22ec16c..bd8dc0a1 100755
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -3859,6 +3859,7 @@ XML:
   - .xml
   - .ant
   - .axml
+  - .builds
   - .ccxml
   - .clixml
   - .cproject
@@ -3890,6 +3891,7 @@ XML:
   - .nuspec
   - .odd
   - .osm
+  - .pkgproj
   - .plist
   - .pluginspec
   - .props
@@ -3897,8 +3899,10 @@ XML:
   - .psc1
   - .pt
   - .rdf
+  - .resx
   - .rss
   - .scxml
+  - .sfproj
   - .srdf
   - .storyboard
   - .stTheme
diff --git a/samples/XML/Demo.sfproj b/samples/XML/Demo.sfproj
new file mode 100644
index 00000000..e6483723
--- /dev/null
+++ b/samples/XML/Demo.sfproj
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\Service Fabric Tools\Microsoft.VisualStudio.Azure.Fabric.ApplicationProject.props" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>93d81507-bccc-43d6-8667-2d42473f0c32</ProjectGuid>
+    <ProjectVersion>1.0</ProjectVersion>
+  </PropertyGroup>
+  <ItemGroup>
+    <None Include="Scripts\Deploy-FabricApplication.ps1" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\ChaosTest.ChaosService\ChaosTest.ChaosService.csproj" />
+    <ProjectReference Include="..\ChaosTest.WebService\ChaosTest.WebService.csproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="ApplicationPackageRoot\ApplicationManifest.xml" />
+    <Content Include="ApplicationParameters\Cloud.xml" />
+    <Content Include="ApplicationParameters\Local.xml" />
+    <Content Include="PublishProfiles\Cloud.xml" />
+    <Content Include="PublishProfiles\Local.xml" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\Service Fabric Tools\Microsoft.VisualStudio.Azure.Fabric.ApplicationProject.targets" />
+</Project>
diff --git a/samples/XML/Strings.resx b/samples/XML/Strings.resx
new file mode 100644
index 00000000..5688c02b
--- /dev/null
+++ b/samples/XML/Strings.resx
@@ -0,0 +1,104 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+	<!-- 
+		Microsoft ResX Schema
+
+		Version 1.3
+
+		The primary goals of this format is to allow a simple XML format 
+		that is mostly human readable. The generation and parsing of the 
+		various data types are done through the TypeConverter classes 
+		associated with the data types.
+
+		Example:
+
+		... ado.net/XML headers & schema ...
+		<resheader name="resmimetype">text/microsoft-resx</resheader>
+		<resheader name="version">1.3</resheader>
+		<resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+		<resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+		<data name="Name1">this is my long string</data>
+		<data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+		<data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+			[base64 mime encoded serialized .NET Framework object]
+		</data>
+		<data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+			[base64 mime encoded string representing a byte array form of the .NET Framework object]
+		</data>
+
+		There are any number of "resheader" rows that contain simple 
+		name/value pairs.
+
+		Each data row contains a name, and value. The row also contains a 
+		type or mimetype. Type corresponds to a .NET class that support 
+		text/value conversion through the TypeConverter architecture. 
+		Classes that don't support this are serialized and stored with the 
+		mimetype set.
+
+		The mimetype is used for serialized objects, and tells the 
+		ResXResourceReader how to depersist the object. This is currently not 
+		extensible. For a given mimetype the value must be set accordingly:
+
+		Note - application/x-microsoft.net.object.binary.base64 is the format 
+		that the ResXResourceWriter will generate, however the reader can 
+		read any of the formats listed below.
+
+		mimetype: application/x-microsoft.net.object.binary.base64
+		value   : The object must be serialized with 
+			: System.Serialization.Formatters.Binary.BinaryFormatter
+			: and then encoded with base64 encoding.
+
+		mimetype: application/x-microsoft.net.object.soap.base64
+		value   : The object must be serialized with 
+			: System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+			: and then encoded with base64 encoding.
+
+		mimetype: application/x-microsoft.net.object.bytearray.base64
+		value   : The object must be serialized into a byte array 
+			: using a System.ComponentModel.TypeConverter
+			: and then encoded with base64 encoding.
+	-->
+	
+	<xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+		<xsd:element name="root" msdata:IsDataSet="true">
+			<xsd:complexType>
+				<xsd:choice maxOccurs="unbounded">
+					<xsd:element name="data">
+						<xsd:complexType>
+							<xsd:sequence>
+								<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+								<xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+							</xsd:sequence>
+							<xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+							<xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+							<xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+						</xsd:complexType>
+					</xsd:element>
+					<xsd:element name="resheader">
+						<xsd:complexType>
+							<xsd:sequence>
+								<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+							</xsd:sequence>
+							<xsd:attribute name="name" type="xsd:string" use="required" />
+						</xsd:complexType>
+					</xsd:element>
+				</xsd:choice>
+			</xsd:complexType>
+		</xsd:element>
+	</xsd:schema>
+	<resheader name="resmimetype">
+		<value>text/microsoft-resx</value>
+	</resheader>
+	<resheader name="version">
+		<value>1.3</value>
+	</resheader>
+	<resheader name="reader">
+		<value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.3500.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+	</resheader>
+	<resheader name="writer">
+		<value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.3500.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+	</resheader>
+  <data name="Argument_InvalidPathChars" xml:space="preserve">
+    <value>Illegal characters in path.</value>
+  </data>
+</root>
diff --git a/samples/XML/System.Buffers.pkgproj b/samples/XML/System.Buffers.pkgproj
new file mode 100644
index 00000000..98a86c89
--- /dev/null
+++ b/samples/XML/System.Buffers.pkgproj
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+
+  <ItemGroup>
+    <ProjectReference Include="..\src\System.Buffers.builds">
+      <SupportedFramework>net45;netcore45;netstandardapp1.5;wpa81</SupportedFramework>
+    </ProjectReference>
+  </ItemGroup>
+
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+</Project>
diff --git a/samples/XML/src.builds b/samples/XML/src.builds
new file mode 100644
index 00000000..dd3e2d9d
--- /dev/null
+++ b/samples/XML/src.builds
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <ItemGroup>
+    <Project Include="*\src\*.builds" />
+  </ItemGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.traversal.targets))\dir.traversal.targets" />
+</Project>