diff --git a/examples/Spring/Spring.Calculator/src/Spring.Aspects/Spring.Aspects.2005.csproj b/examples/Spring/Spring.Calculator/src/Spring.Aspects/Spring.Aspects.2005.csproj
index 794d235a..1dddd089 100644
--- a/examples/Spring/Spring.Calculator/src/Spring.Aspects/Spring.Aspects.2005.csproj
+++ b/examples/Spring/Spring.Calculator/src/Spring.Aspects/Spring.Aspects.2005.csproj
@@ -1,4 +1,4 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">
   <PropertyGroup>
     <ProjectType>Local</ProjectType>
     <ProductVersion>8.0.50727</ProductVersion>
@@ -27,6 +27,7 @@
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
     <SignAssembly>false</SignAssembly>
+    <OldToolsVersion>2.0</OldToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <OutputPath>bin\Debug\</OutputPath>
diff --git a/examples/Spring/Spring.Calculator/src/Spring.Calculator.ClientApp/Spring.Calculator.ClientApp.2005.csproj b/examples/Spring/Spring.Calculator/src/Spring.Calculator.ClientApp/Spring.Calculator.ClientApp.2005.csproj
index 1f67f755..b4ba4de0 100644
--- a/examples/Spring/Spring.Calculator/src/Spring.Calculator.ClientApp/Spring.Calculator.ClientApp.2005.csproj
+++ b/examples/Spring/Spring.Calculator/src/Spring.Calculator.ClientApp/Spring.Calculator.ClientApp.2005.csproj
@@ -1,4 +1,4 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">
   <PropertyGroup>
     <ProjectType>Local</ProjectType>
     <ProductVersion>8.0.50727</ProductVersion>
@@ -26,6 +26,7 @@
     </FileUpgradeFlags>
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
+    <OldToolsVersion>2.0</OldToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <OutputPath>bin\Debug\</OutputPath>
diff --git a/examples/Spring/Spring.Calculator/src/Spring.Calculator.Contract/Spring.Calculator.Contract.2005.csproj b/examples/Spring/Spring.Calculator/src/Spring.Calculator.Contract/Spring.Calculator.Contract.2005.csproj
index 99898121..5db25046 100644
--- a/examples/Spring/Spring.Calculator/src/Spring.Calculator.Contract/Spring.Calculator.Contract.2005.csproj
+++ b/examples/Spring/Spring.Calculator/src/Spring.Calculator.Contract/Spring.Calculator.Contract.2005.csproj
@@ -1,4 +1,4 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">
   <PropertyGroup>
     <ProjectType>Local</ProjectType>
     <ProductVersion>8.0.50727</ProductVersion>
@@ -26,6 +26,7 @@
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
     <SignAssembly>true</SignAssembly>
+    <OldToolsVersion>2.0</OldToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <OutputPath>bin\Debug\</OutputPath>
diff --git a/examples/Spring/Spring.Calculator/src/Spring.Calculator.RegisterComponentServices/Spring.Calculator.RegisterComponentServices.2005.csproj b/examples/Spring/Spring.Calculator/src/Spring.Calculator.RegisterComponentServices/Spring.Calculator.RegisterComponentServices.2005.csproj
index 63588d33..d8bcace9 100644
--- a/examples/Spring/Spring.Calculator/src/Spring.Calculator.RegisterComponentServices/Spring.Calculator.RegisterComponentServices.2005.csproj
+++ b/examples/Spring/Spring.Calculator/src/Spring.Calculator.RegisterComponentServices/Spring.Calculator.RegisterComponentServices.2005.csproj
@@ -1,4 +1,4 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">
   <PropertyGroup>
     <ProjectType>Local</ProjectType>
     <ProductVersion>8.0.50727</ProductVersion>
@@ -26,6 +26,7 @@
     </FileUpgradeFlags>
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
+    <OldToolsVersion>2.0</OldToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <OutputPath>bin\Debug\</OutputPath>
diff --git a/examples/Spring/Spring.Calculator/src/Spring.Calculator.RemoteApp/Spring.Calculator.RemoteApp.2005.csproj b/examples/Spring/Spring.Calculator/src/Spring.Calculator.RemoteApp/Spring.Calculator.RemoteApp.2005.csproj
index 2ba72477..956d945b 100644
--- a/examples/Spring/Spring.Calculator/src/Spring.Calculator.RemoteApp/Spring.Calculator.RemoteApp.2005.csproj
+++ b/examples/Spring/Spring.Calculator/src/Spring.Calculator.RemoteApp/Spring.Calculator.RemoteApp.2005.csproj
@@ -1,4 +1,4 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">
   <PropertyGroup>
     <ProjectType>Local</ProjectType>
     <ProductVersion>8.0.50727</ProductVersion>
@@ -26,6 +26,7 @@
     </FileUpgradeFlags>
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
+    <OldToolsVersion>2.0</OldToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <OutputPath>bin\Debug\</OutputPath>
diff --git a/examples/Spring/Spring.Calculator/src/Spring.Calculator.Services/Spring.Calculator.Services.2005.csproj b/examples/Spring/Spring.Calculator/src/Spring.Calculator.Services/Spring.Calculator.Services.2005.csproj
index 1fa714a6..557e06f8 100644
--- a/examples/Spring/Spring.Calculator/src/Spring.Calculator.Services/Spring.Calculator.Services.2005.csproj
+++ b/examples/Spring/Spring.Calculator/src/Spring.Calculator.Services/Spring.Calculator.Services.2005.csproj
@@ -1,4 +1,4 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">
   <PropertyGroup>
     <ProjectType>Local</ProjectType>
     <ProductVersion>8.0.50727</ProductVersion>
@@ -26,6 +26,7 @@
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
     <SignAssembly>false</SignAssembly>
+    <OldToolsVersion>2.0</OldToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <OutputPath>bin\Debug\</OutputPath>
diff --git a/examples/Spring/Spring.WcfQuickStart/src/Spring.WcfQuickStart.Contracts/ICalculator.cs b/examples/Spring/Spring.WcfQuickStart/src/Spring.WcfQuickStart.Contracts/ICalculator.cs
index 97fdce0d..57e5fbca 100644
--- a/examples/Spring/Spring.WcfQuickStart/src/Spring.WcfQuickStart.Contracts/ICalculator.cs
+++ b/examples/Spring/Spring.WcfQuickStart/src/Spring.WcfQuickStart.Contracts/ICalculator.cs
@@ -42,20 +42,20 @@ namespace Spring.WcfQuickStart
         }
     }
 
-    [ServiceContract(Namespace = "http://Spring.WcfQuickStart")]
+//    [ServiceContract(Namespace = "http://Spring.WcfQuickStart")]
     public interface ICalculator
     {
-        [OperationContract]
+//        [OperationContract]
         double Add(double n1, double n2);
-        [OperationContract]
+//        [OperationContract]
         double Subtract(double n1, double n2);
-        [OperationContract]
+//        [OperationContract]
         double Multiply(double n1, double n2);
-        [OperationContract]
+//        [OperationContract]
         double Divide(double n1, double n2);
-        [OperationContract]
+//        [OperationContract]
         string GetName();
-        [OperationContract]
+//        [OperationContract]
         OperationResult Power(BinaryOperationArgs args);
     }
 }