Entity Framework replaced LINQ to SQL years ago - it’s had multiple major revisions, and two major revs of the .NET Core version.

The initial version in 2008 was a total mess. It wasn’t until a few years later that the XML definition and code generation junk was removed and it became useable.

LINQ to SQL has been abandoned for a long time (since they introduced Entity Framework) but there are a ton of other ORM/DB access tools like Dapper, Massive, PetaPoco, linq2db, nHibernate, Insight.Database, OrmLite, LLBLGen Pro, etc.