C Sharp - Useful methods - 3 [ IsValidEmailAddress]

Introduction

IsValidEmailAddress

This is used to Validating the Email Address. 

        /// <summary>
        /// Validating Email Address
        /// </summary>
        /// <param name="lsEmail"></param>
        /// <returns></returns>
        public static bool IsValidEmailAddress( string lsEmail )
        {
            bool lbResult;
            int liPosAtChar = -1 , liPosDotChar = -1;
            lbResult = Utility.IsValidTextBox( lsEmail );
            if ( lbResult )
            {
                liPosAtChar = lsEmail.IndexOf( "@" );
                liPosDotChar = lsEmail.IndexOf( "." );
                if ( ( liPosDotChar == 0 ) || ( liPosAtChar == 0 ) )
                { lbResult = false; }
                if ( lbResult )
                {
                    if ( liPosDotChar == liPosAtChar + 1 )
                    { lbResult = false; }
                    if ( lbResult )
                    {
                        int liposAtcharPlusone = liPosAtChar + 1;
                        if ( lsEmail.IndexOf( "@" , liposAtcharPlusone ) > 0 )
                        {
                            lbResult = false;
                        }
                        else
                        {
                            lbResult = true;
                        }
                    }
                }
            }
            return lbResult;
        }