System.Security.Cryptography.CryptoStream.CheckReadArguments C# (CSharp) Method

        private void CheckReadArguments(byte[] buffer, int offset, int count)
        {
            if (!CanRead)
                throw new NotSupportedException(SR.NotSupported_UnreadableStream);
            if (offset < 0)
                throw new ArgumentOutOfRangeException(nameof(offset), SR.ArgumentOutOfRange_NeedNonNegNum);
            if (count < 0)
                throw new ArgumentOutOfRangeException(nameof(count), SR.ArgumentOutOfRange_NeedNonNegNum);
            if (buffer.Length - offset < count)
                throw new ArgumentException(SR.Argument_InvalidOffLen);
        }