private void GetNextCluster()
{
CurrentClusterStart += ClusterSize;
CurrentClusterEnd = CurrentClusterStart + ClusterSize;
CurrentClusterNumber = fat.GetNextCluster(CurrentClusterNumber);
if (CurrentClusterNumber == (fat as FileAllocationTableFAT32).ClusterEOL)
{
throw new Exception("end of file");
}
CurrentCluster = fs.ReadCluster(CurrentClusterNumber);
}