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Microsoft Visual F# signature data
File type: Source code and script file
An fsi file extension is related to the F# a functional programming language. An fsi file contains signature data.
Found 3 different file type records with the same fsi filename suffix.
File type category:
Source code and script file
Date updated: December 31, 2024
The fsi file extension is associated with Microsoft Visual F#.
F# is a functional programming language for the .NET Framework. It combines the succinct, expressive, and compositional style of functional programming with the runtime, libraries, interoperability, and object model of .NET.
The fsi files are used for signature files used by Visual F#, a component of Microsoft's Visual Studio software development kit. The .fsi signature files contain information about the F# program element's public signatures, including types, namespaces, and other components.
The .fsi files can be used to specify accessibility rules to program code within an fs. This technique is used to restrict access to other program code that executes outside of the controlled fs.
The .fsi files always have the same filename as their associated fs.
Use any of the Microsoft Visual Studio suites to work with .fsi files.
Conversion to other formats is not possible.
Software applications that can open fsi files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software applications that can edit fsi files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Software capable of saving fsi files:
Microsoft Windows
Apple macOS / Mac OS X
Linux/Unix
Multiplatform
Programs for viewing fsi files:
Microsoft Windows
Microsoft Windows NotePad
Apple macOS / Mac OS X
Multiplatform
Software apps that create fsi files:
Multiplatform
Software apps that print fsi files:
Microsoft Windows
Microsoft Windows NotePad
Apple macOS / Mac OS X
Multiplatform
Software applications that handle other tasks involving fsi files:
Multiplatform
File type category:
Various data file
Date updated: November 8, 2018
Record marked as obsolete and not updated for a long time.
The fsi file extension is also used by the FileSplit, a file splitting utility for its default split file.
Used to split large files to several smaller ones. Probably obsolete software.
You should be able to work and merge these files using FileSplit utility.
Software applications that handle other tasks involving fsi files:
Microsoft Windows
FileSplit
File type category:
Configuration file
Date updated: April 5, 2017
The fsi file extension is associated with the FSI Viewer, a web based picture viewer aimed for high resolution images.
The fsi file stores some kind of configuration of FSI Viewer.
Software applications that can open fsi files:
On-line services
Software apps that manage or store settings in fsi files:
On-line services
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