System.Xml.XmlBaseReader.ReadValueChunk C# (CSharp) Méthode

        public override int ReadValueChunk(char[] chars, int offset, int count)
        {
            if (chars == null)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException(nameof(chars)));
            if (offset < 0)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException(nameof(offset), SR.Format(SR.ValueMustBeNonNegative)));
            if (offset > chars.Length)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException(nameof(offset), SR.Format(SR.OffsetExceedsBufferSize, chars.Length)));
            if (count < 0)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException(nameof(count), SR.Format(SR.ValueMustBeNonNegative)));
            if (count > chars.Length - offset)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException(nameof(count), SR.Format(SR.SizeExceedsRemainingBufferSpace, chars.Length - offset)));
            int actual;

            if (_value == null)
            {
                if (_node.QNameType == QNameType.Normal)
                {
                    if (_node.Value.TryReadChars(chars, offset, count, out actual))
                        return actual;
                }
            }

            string value = this.Value;
            actual = Math.Min(count, value.Length);
            value.CopyTo(0, chars, offset, actual);
            _value = value.Substring(actual);
            return actual;
        }