Aspose.Diagram for .NET is a .NET library designed to allow developers to work with VSD and VDX files on ASP .NET web applications and web services. It allows you to open files and manipulate the elements of the diagram, from lines and fills, to more complex elements, and then export to native Visio formats or XML.
The class library is an alternative to the Microsoft Visio Object Model and provides a better performance. It makes use of the advanced functionality of Visio's services to manipulate Visio documents on a server. The API is extensible, easy to use and compact. It provides common functionality so that developers have to write less code when performing common tasks.
Aspose.Diagrams is aimed at developers who need to work with Visio files form within their own applications. It allows you to manipulate the file format quickly and easily, saving time and effort in developing a solution for working with these files

No Microsoft Visio Automation:
· Aspose.Diagram, as a pure .NET alternate for MS Visio Object Model provides much better performance and ease of use to manipulate diagrams and conversions into accepted formats. Aspose.Diagram also leverages advanced functionality provided by Visio services to manipulate Visio documents at server.
Read, Change and Write Microsoft Visio Documents:
· Aspose.Diagram for .NET provides a class library to read Microsoft Visio files in native VSD format as well as the Visio XML (VDX) format. The contents of the diagram can be manipulated through the Aspose.Diagram API. After making the required changes to the Visio file, the file can then be written to disk in Visio XML (VDX) format.
Platform Independence:
· You can confidently use Aspose.Diagram for .NET to build any type of a 32-bit or 64-bit .NET application including ASP.NET, Web Services and WinForms. Aspose.Diagram for .NET is easy to deploy because it is just a class library without any dependencies (except on the .NET Framework itself).
Support for Different File Formats:
· Using Aspose.Diagram for .NET, developers can easily open a multitude of file formats.
Manipulate Visio Objects:
· Using Aspose.Diagram for .NET, developers can easily access and read the properties of different Visio objects like Document, Page, Master, Shape and Connect etc.

Requirements:
· NET Framework 4.0 or below

What's New in This Release:
New Features:
· 21632 - Export Diagram data to PDF (PDF/A-1 compliance)
· 28614 - Export diagram data to XPS format
Enhancements:
· 29410 - Add DefaultFont property to saving SaveOptions
· 29335 - Different line ends support by GDI+
· 28793 - Check Japanese fonts support in rendering features
· 29174 - Support for Asian font when converting VSD to PDF
· 27462 - Different security and compression settings for rendering to PDF
· 29198 – Add evaluation restrictions when writing into VDX format
Bugs:
· 28896 - Wrong text alignment
· 28893 - Wrong image size calculation during rendering
· 29458 - Wrong position and formatting of text when rendering diagram with Asian font
· 28954 – Wrong color filling on first page ActvDir.vsd
· 29201 – [Rendering Exception] Invalid transformation parameter
· 28895 - Incorrect arc in diagram rendering