In any C# application one common problem I noticed is, declare large number of
using for namespaces in every .cs files. This has been taken care now by introducing global using in C# 10. Now you can declare common namespace
using statements in single file and every file in that project can refer them. No need to declare large number of common
using statements in every file.
Read more about global
using here. Also there is a good YouTube tutorial on this.
I think this is a very nice feature.