我可以用标准委托代替谓词吗?

出于兼容性原因,必须显式实例化委托,即使不同委托的签名兼容。这没有很好的文档记录,请参阅中的讨论 this question .

public void Test()
{
    var l = new List<MyObject>();
    // The following three lines
    var x = new X(my => string.IsNullOrEmpty(my.Name));
    var p = new Predicate<MyObject>(x);
    l.RemoveAll(p);
    // ...will accomplish the same as:
    l.RemoveAll(my => string.IsNullOrEmpty(my.Name));
}

private delegate bool X(MyObject m);

private class MyObject
{
    public string Name { get; set; }
}