System.Text.EncoderFallbackBuffer
namespace System.Text
{
public abstract class EncoderFallbackBuffer
{
public abstract int Remaining { get; }
protected EncoderFallbackBuffer();
public abstract bool Fallback(char charUnknownHigh, char charUnknownLow, int index);
public abstract bool Fallback(char charUnknown, int index);
public abstract char GetNextChar();
public abstract bool MovePrevious();
public virtual void Reset();
}
}