https://learn.microsoft.com/en-us/dotnet/api/microsoft.sqlserver.dts.tasks.webservicetask.webservicetask.loadfromxml?view=sqlserver-2019
WebServiceTask.LoadFromXML(XmlElement, IDTSInfoEvents) Method...
This method is not callable by your application code. To load a package saved as .xml, use the LoadPackage(String, IDTSEvents) method.
xmlelementmethod