The repository root license file is MIT:
LICENSE.TXTSvg.Custom packages vendored source from externals/SVG, and that upstream source carries the Microsoft Public License (Ms-PL):
externals/SVG/license.txtsrc/Svg.Custom/Svg.Custom.csproj declares PackageLicenseExpression as MS-PLWhen consuming or redistributing packages from this repository, check the package-level license metadata in addition to the repository root license. The repo is not a single-license story once the vendored SVG source is included.