Parameters

bytes

The byte array containing the sequence of bytes to decode.

index

The index of the first byte to decode.

count

The number of bytes to decode.

Returns

The number of characters produced by decoding the specified sequence of bytes.

Exceptions

Type	Reason
ArgumentNullException	bytes is null.
ArgumentOutOfRangeException	index or count is less than zero. -or- index and count do not specify a valid range in bytes (i.e. (index + count) > bytes.Length).
ArgumentException	Error-checking is turned on for the current instance and bytes contains an invalid surrogate sequence.

Remarks

To calculate the exact array size required by UTF8Encoding.GetChars(Byte[], int, int, Char[], int) to store the resulting characters, the application uses UTF8Encoding.GetCharCount(Byte[], int, int). To calculate the maximum array size, the application should use UTF8Encoding.GetMaxCharCount(int). The UTF8Encoding.GetCharCount(Byte[], int, int) method generally allows allocation of less memory, while the UTF8Encoding.GetMaxCharCount(int) method generally executes faster.

With error detection, an invalid sequence causes this method to throw a ArgumentException. Without error detection, invalid sequences are ignored, and no exception is thrown.

Requirements