/// <summary>
/// Finds specified byte in the blob following the current position.
/// </summary>
/// <returns>
/// Index relative to the current position, or -1 if the byte is not found in the blob following the current position.
/// </returns>
/// <remarks>
/// Doesn't change the current position.
/// </remarks>
public int IndexOf(byte value)
{
int start = Offset;
int absoluteIndex = _block.IndexOfUnchecked(value, start);
return((absoluteIndex >= 0) ? absoluteIndex - start : -1);
}