正确使用C#中的IDisposable接口：如何避免内存泄漏？

public class FileProcessor : IDisposable
{
    private FileStream _fileStream;
    private NetworkStream _networkStream;
    private bool _disposed = false;

    public void ProcessFile(string path)
    {
        _fileStream = new FileStream(path, FileMode.Open);
        // 一些处理
    }

    public void Dispose()
    {
        if (_fileStream != null)
            _fileStream.Dispose();
        if (_networkStream != null)
            _networkStream.Dispose();
    }
}