diff --git a/src/Spring/Spring.Messaging.Nms/Spring.Messaging.Nms.2008.csproj b/src/Spring/Spring.Messaging.Nms/Spring.Messaging.Nms.2008.csproj
index efdf0f14..035ee761 100644
--- a/src/Spring/Spring.Messaging.Nms/Spring.Messaging.Nms.2008.csproj
+++ b/src/Spring/Spring.Messaging.Nms/Spring.Messaging.Nms.2008.csproj
@@ -31,6 +31,7 @@
     <DefineConstants>TRACE;NET_2_0</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Apache.NMS, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
diff --git a/src/Spring/Spring.Messaging.Nms/Spring.Messaging.Nms.build b/src/Spring/Spring.Messaging.Nms/Spring.Messaging.Nms.build
index 37bb659e..e3fa9304 100644
--- a/src/Spring/Spring.Messaging.Nms/Spring.Messaging.Nms.build
+++ b/src/Spring/Spring.Messaging.Nms/Spring.Messaging.Nms.build
@@ -8,7 +8,7 @@
  -->
     <target name="build">
         <csc target="library" define="${current.build.defines.csc}"
-            warnaserror="false"
+            warnaserror="true"
             optimize="${build.optimize}"
             debug="${current.build.debug}"
             output="${current.bin.dir}/${project::get-name()}.dll"
diff --git a/src/Spring/Spring.Messaging/Spring.Messaging.2008.csproj b/src/Spring/Spring.Messaging/Spring.Messaging.2008.csproj
index d3b49491..2939aa33 100644
--- a/src/Spring/Spring.Messaging/Spring.Messaging.2008.csproj
+++ b/src/Spring/Spring.Messaging/Spring.Messaging.2008.csproj
@@ -29,6 +29,7 @@
     <DefineConstants>TRACE;NET_2_0</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Common.Logging, Version=1.2.0.0, Culture=neutral, PublicKeyToken=af08829b84f0328e">
diff --git a/src/Spring/Spring.Messaging/Spring.Messaging.build b/src/Spring/Spring.Messaging/Spring.Messaging.build
index bf11063d..8f3d1ba7 100644
--- a/src/Spring/Spring.Messaging/Spring.Messaging.build
+++ b/src/Spring/Spring.Messaging/Spring.Messaging.build
@@ -8,7 +8,7 @@
  -->
     <target name="build">
         <csc target="library" define="${current.build.defines.csc}"
-            warnaserror="false"
+            warnaserror="true"
             optimize="${build.optimize}"
             debug="${current.build.debug}"
             output="${current.bin.dir}/${project::get-name()}.dll"
diff --git a/src/Spring/Spring.Template.Velocity/Spring.Template.Velocity.build b/src/Spring/Spring.Template.Velocity/Spring.Template.Velocity.build
index 0b6b1649..afbe906a 100644
--- a/src/Spring/Spring.Template.Velocity/Spring.Template.Velocity.build
+++ b/src/Spring/Spring.Template.Velocity/Spring.Template.Velocity.build
@@ -8,7 +8,7 @@
  -->
     <target name="build">
         <csc target="library" define="${current.build.defines.csc}"
-                warnaserror="false"
+            warnaserror="true"
             optimize="${build.optimize}"
             debug="${current.build.debug}"
             output="${current.bin.dir}/${project::get-name()}.dll"
diff --git a/src/Spring/Spring.Testing.Microsoft/Spring.Testing.Microsoft.2008.csproj b/src/Spring/Spring.Testing.Microsoft/Spring.Testing.Microsoft.2008.csproj
index 1e787fce..cadd8e0c 100644
--- a/src/Spring/Spring.Testing.Microsoft/Spring.Testing.Microsoft.2008.csproj
+++ b/src/Spring/Spring.Testing.Microsoft/Spring.Testing.Microsoft.2008.csproj
@@ -38,6 +38,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <DocumentationFile>..\..\..\build\VS.NET.2008\Spring.Testing.Microsoft\Debug\Spring.Testing.Microsoft.xml</DocumentationFile>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
diff --git a/src/Spring/Spring.Testing.Microsoft/Spring.Testing.Microsoft.build b/src/Spring/Spring.Testing.Microsoft/Spring.Testing.Microsoft.build
index 52f02ed9..228aec13 100644
--- a/src/Spring/Spring.Testing.Microsoft/Spring.Testing.Microsoft.build
+++ b/src/Spring/Spring.Testing.Microsoft/Spring.Testing.Microsoft.build
@@ -8,7 +8,7 @@
  -->
     <target name="build">
         <csc target="library" define="${current.build.defines.csc}"
-            warnaserror="false"
+            warnaserror="true"
             optimize="${build.optimize}"
             debug="${current.build.debug}"
             output="${current.bin.dir}/${project::get-name()}.dll"
diff --git a/src/Spring/Spring.Testing.NUnit/Spring.Testing.NUnit.2008.csproj b/src/Spring/Spring.Testing.NUnit/Spring.Testing.NUnit.2008.csproj
index d217eadf..3ebaaa6c 100644
--- a/src/Spring/Spring.Testing.NUnit/Spring.Testing.NUnit.2008.csproj
+++ b/src/Spring/Spring.Testing.NUnit/Spring.Testing.NUnit.2008.csproj
@@ -30,6 +30,7 @@
     <WarningLevel>4</WarningLevel>
     <NoWarn>1587, 1591, 219, 162, 618</NoWarn>
     <DocumentationFile>Spring.Testing.NUnit.xml</DocumentationFile>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Common.Logging, Version=1.0.2.0, Culture=neutral, PublicKeyToken=af08829b84f0328e">
diff --git a/src/Spring/Spring.Testing.NUnit/Spring.Testing.NUnit.build b/src/Spring/Spring.Testing.NUnit/Spring.Testing.NUnit.build
index c83f4b42..633ce0a1 100644
--- a/src/Spring/Spring.Testing.NUnit/Spring.Testing.NUnit.build
+++ b/src/Spring/Spring.Testing.NUnit/Spring.Testing.NUnit.build
@@ -8,7 +8,7 @@
  -->
     <target name="build">
         <csc target="library" define="${current.build.defines.csc}"
-            warnaserror="false"
+            warnaserror="true"
             optimize="${build.optimize}"
             debug="${current.build.debug}"
             output="${current.bin.dir}/${project::get-name()}.dll"