File Extension Library


.FSI File Extension

  • Developer by: Microsoft
  • Category: Developer Files
  • Format: Text

What are .FSI files and how to open them?

Can't open .FSI file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .FSI file.

What is a .FSI file extension?

.FSI file extension is created by Microsoft. .FSI has been classified as Developer Files. The format of .FSI file is Text.

.FSI is Visual F# Signature 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.

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.

List of all softwares that can open the Visual F# Signature File
Windows
Microsoft Visual Studio 2017

How to fix problems with .FSI files

  1. You need to update the application that you normally use to open .FSI files. Only the latest version of the software supports the current .FSI file format
  2. You need to check the .FSI file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)