EncoderFallbackBuffer.Fallback Method (Char, Char, Int32)
When overridden in a derived class, prepares the fallback buffer to handle the specified surrogate pair.
Assembly: mscorlib (in mscorlib.dll)
Public MustOverride Function Fallback ( charUnknownHigh As Char, charUnknownLow As Char, index As Integer ) As Boolean
The high surrogate of the input pair.
The low surrogate of the input pair.
The index position of the surrogate pair in the input buffer.
Return ValueType: System.Boolean
true if the fallback buffer can process charUnknownHigh and charUnknownLow; false if the fallback buffer ignores the surrogate pair.
The Encoding.GetBytes and Encoder.Convert methods call if they encounter a surrogate pair in their input. A return value of true indicates that the fallback buffer can process the surrogate pair, which causes the calling method to call the GetNextChar method to obtain each character of the fallback buffer. Because it does not process individual characters, the Fallback method in an exception fallback handler throws an exception.
Available since 10
Available since 2.0