v5.1.1

PDF Format

Fixed a issue with the Pdf and AdobePdf formats which could cause files to be incorrectly categorized as a PDF.

v5.1.0

New Formats

• Adds support for Icon format.
• Adds support for office files with macros.

Thanks to @codethug for the contribution.

v5.0.2

Executable Media Type

Changed the media type for the Executable format to be application/vnd.microsoft.portable-executable so that it aligns with the official IANA media type for Windows executables.

v5.0

PDF Format

Fixed an issue where PDFs were not recognized if the header contains data before the %PDF signature, or where the signature is in the format %!PS−Adobe−N.n PDF−M.m.

Thanks to @MaximeLaffaire for the contribution.

.NET Framework Targets Removed

.NET Framework 4.5.2 and 4.6.1 have been removed as specific target frameworks as these are no longer supported.

v4.4.1

Fixed an issue with vcard file recognition. Thanks to @mburumaxwell for the contribution.

v4.4

Adds support for the following formats:

• Vcard
• AMR
• OGG
• MP3

Thanks to @mburumaxwell for the contributions.

v4.3.1

Fixed detection of Office documents when the main entry has a non-standard name (e.g. document2.xml instead of document.xml)

v4.3

Adds support for the following formats:

• MP4 (includes .m4a. .m4v, .mov)
• 3GPP
• WEBP

v4.2

File formats can now be created with zero-length signatures to allow detection of files with inconsistent structure.

v4.1

The library is now signed so that it can be referenced by other signed assemblies.