A constructor cannot be virtual primarily because the virtual table or vtable is not available in the memory when it is in execution. A class provides a constructor be default — such a ...

Primary constructors in C# 12 can be used in classes and structs ... constructors to initialize properties of a class with default values or specific values passed as constructor parameters.

primary constructors for all classes and structs, syntax to alias any type, and default parameters for lambda expressions. C# 12 introduces the extension of primary constructors to include this ...