public static SyntaxList <UsingDirectiveSyntax> Sort(this SyntaxList <UsingDirectiveSyntax> list, bool systemNamespacesFirst = true)
{
return(SyntaxFactory.List
(
list
.Distinct(UsingDirectiveSyntaxEqualityComparer.Default)
.OrderBy(x => x.StaticKeyword.IsKind(SyntaxKind.StaticKeyword) ? 3 : x.Alias == null ? 1 : 2)
.ThenByDescending(x => systemNamespacesFirst && x.Name.ToString() == "System" || x.Name.ToString().StartsWith(nameof(System)))
.ThenBy(c => c.Name.ToString().Length)
.ThenBy(x => x.Alias?.ToString())
.ThenBy(x => x.Name.ToString())
));
}