C# 14 preview in .NET 10 Preview 3 adds static extension methods, instance and static extension properties, and a new optional alternative syntax for extension members.

In C# 14, notable improvements have been made to extension members. These members now support static methods, instance properties, and static properties, expanding the functionality of extensions.

Forthcoming update to the C# language extends params parameter support and introduces a new type that supplies extension members for an underlying type.