.FSI File Extension

Visual F# Signature File

Developer Microsoft
2.0  |  3 Votes

What is an FSI file?

Signature file used by Visual F#, a component of Microsoft's Visual Studio software development kit; contains information about the F# program element's public signatures, including types, namespaces, and components.

More Information

FSI files can be used to specify accessibility rules to program code within an .FS file. This technique is used to restrict access to other program code that executes outside of the controlled FS file.

FSI files always have the same filename prefix as their associated FS file.

Open over 400 file formats with File Viewer Plus.Free Download

Programs that open or reference FSI files

Verified by FileInfo.com

The FileInfo.com team has independently researched the Visual F# Signature file format and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

If you would like to suggest any additions or updates to this page, please let us know.