/// <summary>
/// Creates a variable-sized accessor.
/// </summary>
/// <param name="file"></param>
/// <param name="sizeInBytes"></param>
/// <returns></returns>
private MemoryMappedAccessor <T> CreateAccessor(MemoryMappedFile file, long sizeInBytes)
{
return(file.CreateVariable <T>(sizeInBytes, _readFrom, _writeTo));
}