如何处理属于另一个类的属性的类?

如果“service”类维护对非托管资源的引用,则它应实现IDisposable。这告诉类的客户机,他们需要对“service”的实例调用Dispose()。您可以在类的'dispose()方法中对“dc”调用dispose()。

class Service : IDisposable
{
    public DataContext DC= new DataContext();

    public void Dispose( )
    {
        DC.Dispose( );
    }
}

顺便提一句,我将避免在C中创建公共字段,其中属性是常见的习惯用法。

使服务IDisposable并在Dispose方法中释放DataContext。这是一种常见的模式。

你可以实现 IDisposable 并在Dispose()方法中释放托管的DC。然后使用托管类使用“using”…

using(Service service = new Service())
{
    // do something with "service" here
}

您的服务类应该负责处理DataContext。

使用标准 Dispose pattern .

实现IDisposable: MSDN: Implementing a Dispose Method

public void Dispose() 
{
    Dispose(true);

    // Use SupressFinalize in case a subclass
    // of this type implements a finalizer.
    GC.SuppressFinalize(this);      
}

protected virtual void Dispose(bool disposing)
{
    // If you need thread safety, use a lock around these 
    // operations, as well as in your methods that use the resource.
    if (!_disposed)
    {
        if (disposing) {
            if (DC != null)
                DC.Dispose();
        }

        // Indicate that the instance has been disposed.
        DC = null;
        _disposed = true;   
    }
}