diff --git a/lib/linguist/blob_helper.rb b/lib/linguist/blob_helper.rb
index 559c593b..aa81aee1 100644
--- a/lib/linguist/blob_helper.rb
+++ b/lib/linguist/blob_helper.rb
@@ -171,6 +171,7 @@ module Linguist
     #
     # Includes:
     # - XCode project XML files
+    # - Visual Studio project XNL files
     # - Minified JavaScript
     #
     # Please add additional test coverage to
@@ -178,7 +179,7 @@ module Linguist
     #
     # Return true or false
     def generated?
-      if ['.xib', '.nib', '.pbxproj', '.xcworkspacedata', '.xcuserstate'].include?(extname)
+      if xcode_project_file? || visual_studio_project_file?
         true
       elsif generated_coffeescript? || minified_javascript?
         true
@@ -187,6 +188,36 @@ module Linguist
       end
     end
 
+    # Internal: Is the blob an XCode project file?
+    #
+    # Generated if the file extension is an XCode project
+    # file extension.
+    #
+    # Returns true of false.
+
+    def xcode_project_file?
+      if ['.xib', '.nib', '.pbxproj', '.xcworkspacedata', '.xcuserstate'].include?(extname)
+        true
+      else
+        false
+      end
+    end
+
+    # Internal: Is the blob a Visual Studio project file?
+    #
+    # Generated if the file extension is a Visual Studio project
+    # file extension.
+    #
+    # Returns true of false.
+
+    def visual_studio_project_file?
+      if ['.csproj', '.dbproj', '.fsproj', '.pyproj', '.rbproj', '.vbproj', '.vcxproj', '.wixproj', '.resx', '.sln', '.vdproj', '.isproj'].include?(extname)
+        true
+      else
+        false
+      end
+    end
+
     # Internal: Is the blob minified JS?
     #
     # Consider JS minified if the average line length is
diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 4a068309..ac4178d4 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -937,7 +937,11 @@ XML:
   - .rdf
   - .rss
   - .svg
+  - .wxi
+  - .wxl
+  - .wxs
   - .wsdl
+  - .xaml
   - .xml
   - .xsd
   - .xsl
diff --git a/test/test_blob.rb b/test/test_blob.rb
index dbef035d..ced1e6dd 100644
--- a/test/test_blob.rb
+++ b/test/test_blob.rb
@@ -123,6 +123,19 @@ class TestBlob < Test::Unit::TestCase
     assert blob("MainMenu.nib").generated?
     assert blob("project.pbxproj").generated?
 
+    # Visual Studio Files
+    assert blob("project.csproj").generated?
+    assert blob("project.dbproj").generated?
+    assert blob("project.isproj").generated?
+    assert blob("project.pyproj").generated?
+    assert blob("project.rbproj").generated?
+    assert blob("project.vbproj").generated?
+    assert blob("project.vdproj").generated?
+    assert blob("project.vcxproj").generated?
+    assert blob("project.wixproj").generated?
+    assert blob("project.resx").generated?
+    assert blob("project.sln").generated?
+
     # Long line
     assert !blob("uglify.js").generated?