WiX：CopyFile在卸载时保留孤立的文件

Question

我正在复制现有文件作为我的WiX安装程序的一部分。但是，当我卸载我复制的文件时，CopyFile标签很有用。

<?xml version="1.0" encoding="UTF-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
    <Product Id="*" Name="CopyText" Language="1033" Version="1.0.0.0" Manufacturer="Colin" UpgradeCode="PUT-GUID-HERE">
        <Package InstallerVersion="200" Compressed="yes" InstallScope="perMachine" />

        <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
        <MediaTemplate />

    <Property Id="LICENSESIGPATH" Value="C:\projects\Setup\miCore2\Stuff\028 contents\License.txt.sig" ></Property>
        <Feature Id="ProductFeature" Title="CopyText" Level="1">
            <ComponentGroupRef Id="ProductComponents" />
        </Feature>
    </Product>

    <Fragment>
        <Directory Id="TARGETDIR" Name="SourceDir">
            <Directory Id="ProgramFilesFolder">
                <Directory Id="INSTALLFOLDER" Name="CopyText" />
            </Directory>
        </Directory>
    </Fragment>

    <Fragment>
        <ComponentGroup Id="ProductComponents" >
          <Component Id="License_sig" Directory="INSTALLFOLDER" Guid="*" KeyPath="yes">
            <CopyFile Id="License_sigCopy" DestinationProperty="INSTALLFOLDER"  DestinationName="License.txt.sig" SourceProperty="LICENSESIGPATH"   />
          </Component>
        </ComponentGroup>
    </Fragment>
</Wix>

告诉WiX在卸载时删除复制文件的最佳方法是什么？