Sort and remove (unused) using statements Roslyn script/code?

Question

Sort and remove (unused) using statements Roslyn script/code? I\'m looking for some .NET/Roslyn (compiler as service) code that can run through a project and sort and remov

Answer 1

I use this the following extension method to sort usings

internal static SyntaxList Sort(this SyntaxList usingDirectives, bool placeSystemNamespaceFirst = false) =>
    SyntaxFactory.List(
        usingDirectives
        .OrderBy(x => x.StaticKeyword.IsKind(SyntaxKind.StaticKeyword) ? 1 : x.Alias == null ? 0 : 2)
        .ThenBy(x => x.Alias?.ToString())
        .ThenByDescending(x => placeSystemNamespaceFirst && x.Name.ToString().StartsWith(nameof(System) + "."))
        .ThenBy(x => x.Name.ToString()));

and

compilationUnit = compilationUnit.WithUsings(SortUsings(compilationUnit.Usings))