Parameterless constructor, for creating StagingTaskData. No properties are initialized except SystemVersion.

Creates StagingTaskData from serialized StagingTaskData. Should be used on target server. All properties are initialized from serialized StagingTaskData.

Creates StagingTaskData from serialized StagingTaskInfo. Should be used before sending data from source to target. All properties are initialized, UserName and UserGuid are equal to CurrentUser.