MOBILE_API/Business/KftcPasswordRule/MobileNumberRule.cs

namespace Business.KftcPasswordRule
{
    /// <summary>
    /// </summary>
    public class MobileNumberRule : PasswordRule
    {
        /// <summary>
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public PasswordValidationResult Validate(ValidationModel model)
        {
            string mobileNum = "";
            if (model.MobileNo.Contains("+82"))
            {
                mobileNum = model.MobileNo.Replace("+82", "0");
            }
            else
            {
                string mobileFirst2 = model.MobileNo.Substring(0, 2);

                if (mobileFirst2 == "82")
                {
                    mobileNum = "0" + model.MobileNo.Substring(2, model.MobileNo.Length - 2);
                }
                else if (model.MobileNo.Substring(0, 1) != "0" && model.MobileNo.Length == 10)
                {
                    mobileNum = "0" + mobileNum;
                }
                else
                {
                    mobileNum = model.MobileNo;
                }
            }
            string mobileNum1 = mobileNum.Substring(3, mobileNum.Length - 3);

            if (model.Password.Contains(mobileNum1))
            {
                return new PasswordValidationResult { IsValid = false, Message = "Password can not be same as mobile number!" };
            }
            return new PasswordValidationResult { IsValid = true, Message = "valid" };
        }
    }
}