Emacs - Adjust csharp-ts-mode indentation rules

eval-after-load.el

(eval-after-load "csharp-mode"
  '(progn
     ;; Adjustments for indentation.
     ;; This one is for the open curly for the using statement.
     ;; (The using _directive_ (for import at top of file) is different.)
     (setf (cdr (car csharp-ts-mode--indent-rules))
           (cons
            '((parent-is "using_statement") parent-bol 0)
            (cdr (car csharp-ts-mode--indent-rules))))
     ;; This rule is for the opening curly brace on anonymous lambdas, when the
     ;; open curly is on a new line.
     (setf (cdr (car csharp-ts-mode--indent-rules))
           (cons
            '((parent-is "lambda_expression") parent-bol 0)
            (cdr (car csharp-ts-mode--indent-rules))))
     (setq-local treesit-simple-indent-rules csharp-ts-mode--indent-rules)
     ))