DecoderFallbackBuffer.Fallback Method (Byte[], Int32)


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When overridden in a derived class, prepares the fallback buffer to handle the specified input byte sequence.

Namespace:   System.Text
Assembly:  mscorlib (in mscorlib.dll)

public abstract bool Fallback(
	byte[] bytesUnknown,
	int index


Type: System.Byte[]

An input array of bytes.

Type: System.Int32

The index position of a byte in bytesUnknown.

Return Value

Type: System.Boolean

true if the fallback buffer can process bytesUnknown; false if the fallback buffer ignores bytesUnknown.

The Encoding.GetChars, Encoding.GetString, and Decoder.Convert methods call Fallback if they encounter an unknown input byte sequence that cannot be decoded. A return value of true indicates that the fallback buffer can process the input byte sequence, which causes the calling method to call the GetNextChar method to obtain each character of the fallback buffer. Because it does not process individual bytes, the Fallback method in an exception fallback handler throws an exception.

Universal Windows Platform
Available since 10
.NET Framework
Available since 2.0
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