Answer by Kyle McClellan for using system.linq for each new project created?

If you're using C# 10+ (default with .NET 6+), you can enable ImplicitUsings in your project file. There are a handful of common namespaces (including the two you mention) that are then automatically imported for all your code files. More info here: https://devblogs.microsoft.com/dotnet/welcome-to-csharp-10/#global-and-implicit-usings

Your .csproj file might look like this:

<Project Sdk="Microsoft.NET.Sdk"><PropertyGroup><TargetFramework>net6.0</TargetFramework><ImplicitUsings>enable</ImplicitUsings></PropertyGroup></Project>