System.Diagnostics.Debug.GetIndentString C# (CSharp) 메소드

        private static string GetIndentString()
        {
            int indentCount = IndentSize * IndentLevel;
            if (s_indentString?.Length == indentCount)
            {
                return s_indentString;
            }
            return s_indentString = new string(' ', indentCount);
        }