webapp.ts

 # msdeploy argument to set destination IIS App Name for deploy
    if($virtualApplication)
    {
        $msDeployCmdArgs += [String]::Format(' -setParam:name="IIS Web Application Name",value="{0}/{1}"', $webAppNameForMSDeployCmd, $virtualApplication)
    }
    else
    {
        $msDeployCmdArgs += [String]::Format(' -setParam:name="IIS Web Application Name",value="{0}"', $webAppNameForMSDeployCmd)
    }