Compiling C# Souce Code as a Dynamic Link Library
The following is the command to compile dllsource.cs as a dynamic link library instead of the executable file: $ mcs /target:library dllsource.cs We can also specify a different name of the binary with the /out option. For example: $ mcs /target:library /out:mylibrary.dll dllsource.cs Finally, if we want to compile a souce which depends on a dll file, we need to use the /reference option. $ mcs example.cs /reference:mylibrary.dll Note: mcs is the mono compiler. If you use Microsoft C# compiler, just replace mcs with csc.