Checks if the string starts with special character. This does not include any special character from AllowedSpecialCharacters

   

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebOssApplications.Common
{
    public static class Extensions
    {

        /// <summary>
        /// Checks if the string starts with special character. This does not include any special character from <see cref="AllowedSpecialCharacters"/>
        /// </summary>
        /// <param name="value">Value to check</param>
        /// <returns>True if the string starts with a special character</returns>
        /// <exception cref="ArgumentNullException">Throws if value is null</exception>
        /// <exception cref="ArgumentOutOfRangeException">Throws if value is empty</exception>
        public static bool StartsWithSymbol(this string value)
        {
            if (value == null)
            {
                throw new ArgumentNullException("value");
            }

            if (string.IsNullOrEmpty(value))
            {
                throw new ArgumentOutOfRangeException("value");
            }

            return char.IsSymbol(value, 0) || char.IsPunctuation(value, 0);
        }
    }
}

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Checks if the string starts with special character. This does not include any special character from AllowedSpecialCharacters : String Compare « Data Types « C# / C Sharp

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