LADSoft MSIL Compiler

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The LADSoft MSIL compiler is a variant of Orange C which compiles many C programs to MSIL/.net. It can create either a DLL or an EXE file. It is also possible compile to ILASM source code to see the compiler output.

This compiler will take a list of unmanaged DLLs, and create PINVOKE statements when calls to them are made. However, all such calls must be prototyped, and in general this code will give an error if an unprototyped function is used.

This version of the compiler will import static functions from external assemblies, and enough of the C++ portions of the compiler was enabled to allow one to use them as if they were overloaded functions in C++ namespaces. It also understands __string to mean an MSIL string and can create managed arrays by prefixing the array specifiers instead of postfixing them.

This compiler is capable of compiling either a single source file, or accepting multiple source files and generating a composite EXE or DLL from them.

Two of the larger programs that have been successfully compiled are a modified version of the CC386 compiler and sqlite3 in both DLL and EXE format.

The new DotNetPELib library, written in C++, is used as the interface to generating and loading .NET assemblies


This compiler does not fully support the C language at this time and does not support C++ at all.

An interesting part of this project is the development of an independent C++ library which abstracts the creation of .net assemblies... it is possible to write a few lines of code and have the library generate a complete .net DLL or EXE.


The install below includes the compiler, run time libraries, header files, and many example programs that have been successfully compiled with the compiler. It also includes source code for the C++ library for creation of .net assemblies.

This compiler is hosted on Github.

a CodeProject Article written by Alexandre Bencz discusses this compiler in some depth.

This compiler is released on October 11, 2017 at version 6.0.21.1

ProductSHA256 ChecksumSize
Win32 setup package (WIN32 installer) f958d3d60989d7ba2b0f27004e2b4a430bbec2f12ae25a4f89925c1f02428612 5MB
Executables in zip file format 1204b26efff42a206275ae5410dbf6e9af47a09cf5f534640d6e883a78acf76b 6MB