To use this interface, build Haru as a shared-library (DLL) or use binary package for win32(libharu_x_x_x_dll_win32.zip). There are some example programs in demo directory. The steps to run the demonstration programs is as follows. 1. Build libharu as a shared library and copy libhpdf.dll to "if\c#\demo" directory. (Or expand binary package for win32(libharu_x_x_x_dll_win32.zip) and copy libhpdf.dll to "if\c#\demo" directory.) 2. Compile and run demo programs. (Don't forget to compile hpdf.cs together.) csc /out:FontDemo.exe FontDemo.cs ..\hpdf.cs FontDemo.exe csc /out:ImageDemo.exe ImageDemo.cs ..\hpdf.cs ImageDemo.exe csc /out:JPFontDemo.exe JPFontDemo.cs ..\hpdf.cs JPFontDemo.exe csc /out:LineDemo.exe LineDemo.cs ..\hpdf.cs LineDemo.exe csc /out:OutlineDemo.exe OutlineDemo.cs ..\hpdf.cs OutlineDemo.exe csc /out:Encryption.exe Encryption.cs ..\hpdf.cs Encryption.exe csc /out:Permission.exe Permission.cs ..\hpdf.cs Permission.exe csc /out:RawImageDemo.exe RawImageDemo.cs ..\hpdf.cs RawImageDemo.exe csc /out:TextDemo.exe TextDemo.cs ..\hpdf.cs TextDemo.exe Because I do not know the Visual studio well, I do not explain usage on Visual Studio here. NOTE: libhpdf.dll is required to run the program which uses C# interface for libharu. I tested this interface only in Microsoft .NET Framework SDK 1.1.