The .fs file format stands for F Sharp format.The .fs file extension is found in files that primarily created based on F Sharp programming language. F sharp (F# in some context) is designed for use with Microsoft's .NET library and tools. F# is a strongly typed functional-first language that uses type inference. The programmer does not need to declare types—the compiler deduces types during compilation. F# also allows explicit type annotations, and requires them in varying situations.
FS files are source code files written in Microsoft's F# (pronounced "F Sharp") programming language, which primarily based on the environment of the ML language. FS files can also be written using the Visual F# component of Microsoft Visual Studio 2010. FS files are developer file used for compiling F# code into DLL or EXE program. executables.
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