System.Data.SqlTypes.SqlDecimal.Floor C# (CSharp) Method

        public static SqlDecimal Floor(SqlDecimal n)
        {
            n.AssertValid();

            if (n.IsNull)
                return SqlDecimal.Null;

            if (n._bScale == 0)
                return n;

            bool fFraction;    //Fractional flag

            n.MakeInteger(out fFraction);

            //When the numeric has fraction and is negative, subtract 1 by calling AddULong(1)
            //Otherwise return the integral part.
            if (fFraction && !n.IsPositive)
            {
                n.AddULong(1);
            }

            if (n.FZero())//if result is zero, sign should be positive
                n.SetPositive();
            n.AssertValid();
            return n;
        }