Default The New C# File Template to File-Scoped Namespace

[maroonedsia]

When I create a new C# file in Visual Studio (I am using Version 17.12.0), the default generated content is still using the traditional namespace scope with curly brackets.
The dotnet new class... is already using the new file-scoped namespace syntax, so I think it's time for Visual Studio to use the modern method and generate the default content with a file-scoped namespace statement.