要的AddRange集合 [英] AddRange to a Collection

问题描述

一个同事问我今天怎么一个范围内添加到集合。他有一个从继承收藏℃的类; T> 。有一个得到只已经包含一些项目该类型的物业。他想在另一个集合中添加项目到属性集合。他怎么能在C＃3友好的方式做到这一点？的（注意有关Get-唯一的财产，以防止像做联盟和重新分配方案的约束。）的

A coworker asked me today how to add a range to a collection. He has a class that inherits from Collection<T>. There's a get-only property of that type that already contains some items. He wants to add the items in another collection to the property collection. How can he do so in a C#3-friendly fashion? (Note the constraint about the get-only property, which prevents solutions like doing Union and reassigning.)

当然，与物业一个foreach。添加会工作。但列表< T> 风格的AddRange将更为优雅。

Sure, a foreach with Property. Add will work. But a List<T>-style AddRange would be far more elegant.

这是很容易编写扩展。方法：

It's easy enough to write an extension method:

public static class CollectionHelpers
{
    public static void AddRange<T>(this ICollection<T> destination,
                                   IEnumerable<T> source)
    {
        foreach (T item in source)
        {
            destination.Add(item);
        }
    }
}

但我有感觉，我M重新发明轮子。我没有发现类似的事情在 System.Linq的或 morelinq 。

坏的设计？只需要调用添加？缺少明显的？

Bad design? Just Call Add? Missing the obvious?

推荐答案

没有，这似乎是完全合理的。有一个列表< T> 的AddRange（） T>

No, this seems perfectly reasonable. There is a List<T>.AddRange() method that basically does just this, but requires your collection to be a concrete List<T>.

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