Enumerable.Range implementation(Enumerable.Range 实现)

本文介绍了Enumerable.Range 实现的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

What is the precise implementation of Enumerable.Range in .Net; preferable .Net 4? Is it a yielded for-loop? A custom implementation (IEnumerable, IEnumerator) or?

解决方案

The accepted answer on this question should give you the answer:

public static class Enumerable {
    public static IEnumerable<int> Range(int start, int count) {
        var end = start + count;
        for(var current = start; current < end; ++current) {
            yield return current;
        }
    }
}

This isn't the exact code, as there is a lot of error checking etc. going on within the Range method, and internally, it calls other methods, however, the quoted code above is the "essence" of the Range routine.

Examining the code in Reflector should provide you with far more information.

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