diff --git a/atk/atk.csproj b/atk/atk.csproj
index 437a58106..221ac9563 100644
--- a/atk/atk.csproj
+++ b/atk/atk.csproj
@@ -6,7 +6,7 @@
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{42FE871A-D8CF-4B29-9AFF-B02454E6C976}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>atk</RootNamespace>
     <AssemblyName>atk</AssemblyName>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
diff --git a/cairo/cairo.csproj b/cairo/cairo.csproj
index a9279ab8e..0d58b7787 100644
--- a/cairo/cairo.csproj
+++ b/cairo/cairo.csproj
@@ -6,7 +6,7 @@
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{364577DB-9728-4951-AC2C-EDF7A6FCC09D}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>cairo</RootNamespace>
     <AssemblyName>cairo</AssemblyName>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
diff --git a/gdk/gdk.csproj b/gdk/gdk.csproj
index 9586ca93b..8874c4e91 100644
--- a/gdk/gdk.csproj
+++ b/gdk/gdk.csproj
@@ -6,7 +6,7 @@
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{58346CC6-DE93-45B4-8093-3508BD5DAA12}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>gdk</RootNamespace>
     <AssemblyName>gdk</AssemblyName>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
diff --git a/gio/gio.csproj b/gio/gio.csproj
index 04adba2f7..2206d1af9 100644
--- a/gio/gio.csproj
+++ b/gio/gio.csproj
@@ -6,7 +6,7 @@
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{1C3BB17B-336D-432A-8952-4E979BC90867}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>gio</RootNamespace>
     <AssemblyName>gio</AssemblyName>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
diff --git a/glib/glib.csproj b/glib/glib.csproj
index b2665bfd5..b4970e407 100644
--- a/glib/glib.csproj
+++ b/glib/glib.csproj
@@ -6,7 +6,7 @@
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{3BF1D531-8840-4F15-8066-A9788D8C398B}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>glib</RootNamespace>
     <AssemblyName>glib</AssemblyName>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
diff --git a/gtk/gtk.csproj b/gtk/gtk.csproj
index 516cfdba7..b5279a883 100644
--- a/gtk/gtk.csproj
+++ b/gtk/gtk.csproj
@@ -6,7 +6,7 @@
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{94045F11-4266-40B4-910F-298985AF69D5}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>gtk</RootNamespace>
     <AssemblyName>gtk</AssemblyName>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
diff --git a/pango/pango.csproj b/pango/pango.csproj
index b3559eb4b..476be66cb 100644
--- a/pango/pango.csproj
+++ b/pango/pango.csproj
@@ -6,7 +6,7 @@
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{FF422D8C-562F-4EA6-8590-9D1A5CD40AD4}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>pango</RootNamespace>
     <AssemblyName>pango</AssemblyName>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>