StringExtensions.cs

internal static class StringExtensions
    {
        public static string TruncateTo(this string val, int maxLength, bool ellipsis = true)
        {
            if (val == null || val.Length <= maxLength)
            {
                return val;
            }

            ellipsis = ellipsis && maxLength >= 3;

            return ellipsis ? val.Substring(0, maxLength - 3) + "***" : val.Substring(0, maxLength);
        }
    }