tuitio/src/Tuitio.Domain/Helpers/DataValidationHelper.cs

// Copyright (c) 2020 Tudor Stanciu

using System.Text.RegularExpressions;

namespace Tuitio.Domain.Helpers
{
    internal static class DataValidationHelper
    {
        public static bool StringIsBase64(string str)
        {
            str = str.Trim();
            return (str.Length % 4 == 0) && Regex.IsMatch(str, @"^[a-zA-Z0-9+/]*={0,3}$", RegexOptions.None);
        }
    }
}