使用LINQ检索链接实体

我有以下EF代码第一类：

public class Request
{
    [Key]
    public virtual int RequestID { get; set; }
    ...
    public virtual DateTime CreationDate { get; set; }
}

public class RequestLinked
{
    [Key, Column(Order = 0)]
    [ForeignKey("Request")]
    public int RequestID { get; set; }

    [Key, Column(Order = 1)]
    [ForeignKey("RequestRelated")]
    public int RequestRelatedID { get; set; }

    public virtual Request Request { get; set; }
    public virtual Request RequestRelated { get; set; }
}

我需要在多个请求之间建立链接

例如：假设我有

Request

ids1、2、3。接下来，我定义1-2和1-3之间的链接，如下所示：

new RequestLinked { RequestID = 1, RequestRelatedID = 2 } <-- A    
new RequestLinked { RequestID = 1, RequestRelatedID = 3 } <-- B

newrequestlinked{RequestID=1，RequestRelatedID=2}返回1&2