GroupDocs.Meger-for-.NET_SplittingByPageRangesInDiagrams.cs

// For complete examples and data files, please go to https://github.com/groupdocs-merger/GroupDocs.Merger-for-.NET
string sourceFile = CommonUtilities.sourcePath + fileName;
// Preparing.
string password = "SomePasswordString";
int startPage = 5;
int endPage = 8;
RangeMode mode = RangeMode.EvenPages;
SplitOptions splitOptions = new SplitOptions(FileFormat.Vsdx, password,startPage, endPage, mode);

Stream openFile = new FileStream(sourceFile, FileMode.Open);

// Main method.
MultiDocumentResult splitResult = new DocumentHandler().Split(openFile, splitOptions);
for (int i = 0; i < splitResult.Documents.Count; i++)
{
    Stream documentStream = splitResult.Documents[i].Stream;
    //output file
    var fileStream = File.Create(CommonUtilities.outputPath + "OutPut " + i + "." + FileFormat.Vsdx);
    documentStream.CopyTo(fileStream);
    documentStream.Close();
}