The source code of Xceed Zip for .NET, Xceed Zip for .NET Compact Framework, Xceed FTP for .NET, and Xceed FTP for .NET Compact Framework is available by purchasing a Blueprint subscription, which gives the complete C# source code to the Xceed.Zip.dll, Xceed.FTP.dll, Xceed.Compression.dll, Xceed.FileSystem.dll, Xceed.Compression.Formats.dll, Xceed.Tar.dll and Xceed.GZip.dll, as well as all the files required in order to compile and build these .NET assemblies. The source code is delivered in installation kits separate from the main package, and is provided only to registered users that have purchased a Blueprint subscription. 

The source code available through a Blueprint subscription contains valuable and proprietary trade secrets of Xceed Software Inc. and its use is strictly subject to the terms and conditions of the XCEED SOFTWARE LICENSE AGREEMENT included with the source code.

Specifically what source code is included and what is not included  

Everything you need to build the seven DLL assemblies mentioned above is included, with the exception that the source code provided for building the Xceed.Compression.dll does not include the Deflate64 algorithm. The source code will compile an Xceed.Compression.dll that is identical to the redistributable one in all aspects except that it only supports the normal Deflate algorithm. 

Note: All source code comments and remarks from the original development source code have been preserved in the source code provided through a Blueprint subscription to increase its value for educational purposes.

Usage instructions and recommendations  

To use the source code provided through a Blueprint subscription, simply run the Xceed.Zip.Blueprint.exe, Xceed.ZipCF.Blueprint.exe,  Xceed.FTP.Blueprint.exe or Xceed.FTPCF.Blueprint.exe self-extracting zip file to unzip the source code files into the suggested folder or the folder of your choice. Then load the Xceed.Zip.sln, Xceed.ZipCF.sln, Xceed.Ftp.sln or Xceed.FtpCF.sln file into Visual Studio .NET and build the solution. 

The resulting DLLs do not have a "strong name" embedded into them, so it is not possible to register them in the .NET Global Assembly Cache. Please refer to the Microsoft .NET documentation on how to assign a strong name to an assembly. 

If you wish to distribute the assemblies you have built from the Blueprint source code, it is strongly recommended that you rename the assemblies, for example, by adding "Custom" to their name, in order to make them identifiable to both you and Xceed as corrected or modified versions. Remember that distribution of Blueprint source code (whether compiled or in source code form) is strictly subject to the terms and conditions of the license agreement.