Transform all web.config file

WebConfigTransforms.xml

<Project ToolsVersion="4.0" DefaultTargets="Transform" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <UsingTask TaskName="TransformXml" AssemblyFile="Tools\Microsoft.Web.Publishing.Tasks.dll"/>
	
    <PropertyGroup>
        <SitePath>$(MSBuildProjectDirectory)\..\..\Website</SitePath>
		
        <WebConfigTransformFile>Web.Transform.config</WebConfigTransformFile>
        <OutputFolder>$(MSBuildProjectDirectory)\..\Transformed</OutputFolder>

        <StackTraceEnabled>False</StackTraceEnabled>
    </PropertyGroup>

    <Target Name="Transform">
	
		<!-- discover the files to transform -->
		<ItemGroup>
			<FilesToTransform  Include="$(SitePath)\**\web.config"/>
		</ItemGroup>
	
		<!-- Ensure all target directories exist -->
		<MakeDir Directories="$(OutputFolder)"/>
		<MakeDir Directories="@(FilesToTransform->'$(OutputFolder)\%(RecursiveDir)')"/>
		
		<!-- TransformXml only supports single values for source/transform/destination so use %(FilesToTransform.Identity) to send only 1 value to it -->
		 <TransformXml Source="%(FilesToTransform.Identity)"
                  Transform="$(WebConfigTransformFile)"
                  Destination="@(FilesToTransform->'$(OutputFolder)\%(RecursiveDir)\%(Filename)%(Extension)')" />

    </Target>
		
</Project>