It seems like I'm constantly moving files from one place to another, I think this is because I have way too many storage/machine options. (As a side note, my personal storage capacity is at 800GB currently...thats scary.) I wanted to have a means to cleanly and easily snyc up these files. I was considering purchasing (or finding online) a sync tool, but I didn't want to go that route because a friend of mine, Daniel Brookshier, lost about 4 days of work due to an error with the sync tool. I'm not sure what the error was. So I decided to forget about that approach. Instead I wanted to write an MSBuild project file to do the syncing for me. The idea was to have an MSBuild file that I could place in whatever directories that I wanted to snyc, then I could define the various different locations that I wanted to store these files; ie where on my notebook, where on my desktop; where on my removable media X.
Anywayz to make a long story short I discovered a bug in MSBuild! It creeps up when you invoke the CreateProperty or CreateItem, then invoke CallTarget that will reference that newly created property or item. To clariify this have a look at this simple MSBuild project file.

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Create">
    <Target Name="Create">
        <CreateProperty Value="E:\Data">
            <Output TaskParameter="Value" PropertyName="DestFolder" />
        CreateProperty>
        <CreateItem Include="*.*">
            <Output TaskParameter="Include" ItemName="TestFiles"/>
        CreateItem>
       
        <CallTarget Targets="Print"/>
    Target>