internal void CheckDocumentSetMapping(List docsetlist, string relativeUrl)
{
Folder docsetfolder = ClientContext.Web.GetFolderByServerRelativeUrl(relativeUrl);
ClientContext.Load(docsetfolder, fld => fld.Name, fld => fld.ParentFolder.Name, fld => fld.ServerRelativeUrl, fld => fld.ListItemAllFields);
ClientContext.ExecuteQueryRetry();
var onlineurl = relativeUrl.Replace(docsetlist.RootFolder.ServerRelativeUrl, "");
var localdocuset = FullDocumentSetPath(this.TargetLocation, onlineurl, docsetfolder.Name);
DocumentSet docSet = DocumentSet.GetDocumentSet(ClientContext, docsetfolder);
var docSetStream = docSet.ExportDocumentSet();
ClientContext.ExecuteQueryRetry();
using (var fs = new System.IO.FileStream(localdocuset.FullName, System.IO.FileMode.Create, System.IO.FileAccess.Write, System.IO.FileShare.None))
{
docSetStream.Value.CopyTo(fs);
}
}