小编Sco*_*man的帖子

我希望能够创建一个基类型约束的静态泛型类型

public static class Manager<T> where T : HasId
{
    public static T GetSingleById(ref List<T> items, Guid id)
    {
        // the Id is a property provided by HasId
        return (from i in items where i.Id == id select i).SingleOrDefault();
    }
}

然后添加另一种方法

...
    public static IEnumerable<T> GetManyByParentId(ref List<T> items, Guid parentId) where T : HasIdAndParentId
    {
        // the parentId is a property of HasIdAndParentId which subclasses HasId
        return from i in items where i.ParentId == parentId select i;
    }
... …

这段代码

public class Entity
{
    public string First { get; }
    public string Last { get; }
    public Entity()
    {
        this.First = "First name";
        this.Last = "Last name";
    }
}

将在VS2015中编译而VS2013会出现错误"属性或索引器'ScottRickman.Entity.First'无法分配给它 - 它是只读的"

这是VS2015中的错误吗？