axiosengine/axios/Engine/Extensions/String.cs

using System.Text.RegularExpressions;


namespace Axios.Engine.Extensions
{
    public static class AxiosExtensions_String
    {
        /// <summary>
        /// Get the string slice between the two indexes.
        /// Inclusive for start index, exclusive for end index.
        /// </summary>
        public static string Slice(this string source, int start, int end)
        {
            if (end < 0) // Keep this for negative end support
            {
                end = source.Length + end;
            }
            int len = end - start;               // Calculate length
            return source.Substring(start, len); // Return Substring of length
        }

        public static bool IsNullOrWhiteSpace(this string str)
        {
            if (str == null || str == string.Empty)
                return true;

            if (Regex.Match(str, "([:blank:])").Success)
                return true;

            return false;
        }
    }
}