MSBuild - how to copy files that may or may not exist?

I have a situation where I need to copy a few specific files in a MSBuild script, but they may or may not exist. If they don't exist it's fine, I don't need them then. But the standard <copy> task throws an error if it cannot find each and every item in the list...

From stackoverflow

• I know little of MSBuild but I know you can make custom tasks. Perhaps you can subclass the task and first check if the file exists.

• Use the Exists condition on Copy task.

  <CreateItem Include="*.xml">
    <Output ItemName="ItemsThatNeedToBeCopied" TaskParameter="Include"/>
  </CreateItem>
  
  <Copy SourceFiles="@(ItemsThatNeedToBeCopied)"
        DestinationFolder="$(OutputDir)"
        Condition="Exists('%(RootDir)%(Directory)%(Filename)%(Extension)')"/>
  

  Vilx- : Thanx! I had forgotten about these! :)

• The easiest would be to use the ContinueOnError flag http://msdn.microsoft.com/en-us/library/7z253716.aspx

  <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  
      <ItemGroup>
          <MySourceFiles Include="a.cs;b.cs;c.cs"/>
      </ItemGroup>
  
      <Target Name="CopyFiles">
          <Copy
              SourceFiles="@(MySourceFiles)"
              DestinationFolder="c:\MyProject\Destination"
              ContinueOnError="true"
          />
      </Target>
  
  </Project>
  

  But if something else is wrong you will not notice it. So the condition exist from madgnome's answer would be better.

• It looks like you can mark MySourceFiles as SkipUnchangedFiles="true" and it won't copy the files if they already exist.