c# - linq 查询后未调用 ToString() 重载

Question

<分区>

Answer 1

我无法重现，这是测试总是通过。

它是否也传递给您的编译器？你能用你的工作站检查一下吗？

或者我们是否遗漏了一些不同于您的东西？

public class Node
{
    public string Group { get; set; }
    public int SequenceNumber { get; set; }

    public override string ToString()
    {
        return string.Format("This is the Node.ToString() method!");
    }
}

[TestMethod]
public void Test()
{
    var unsortedNodes = new List<Node>()
    {
        new Node { Group = "A", SequenceNumber = 1 },
        new Node { Group = "A", SequenceNumber = 2 },
        new Node { Group = "A", SequenceNumber = 3 },
        new Node { Group = "B", SequenceNumber = 11 },
        new Node { Group = "B", SequenceNumber = 12 },
        new Node { Group = "C", SequenceNumber = 20 },
    };

    var query = unsortedNodes.OrderBy(n => n.Group).GroupBy(n => n.Group).SelectMany(g => g.OrderBy(n => n.SequenceNumber));
    var _nodes = query.ToList();
    Assert.IsTrue(_nodes.ToList().All(n => n.ToString() == "This is the Node.ToString() method!"));
}