Asp.net 如何在web API get by id函数中根据id返回所有记录

下面是我的get by id函数，它返回用户帐户表中与给定城镇id匹配的第一行或默认行，我想返回具有给定城镇id的所有行（用户）

public HttpResponseMessage Get(string id) {
    using(KWSB_dbEntities entities = new KWSB_dbEntities()) {
        entities.Configuration.ProxyCreationEnabled = false;
        var entity = entities.User_Account.FirstOrDefault(e = > e.Town_Id == id);

        if (entity != null) {
            return Request.CreateResponse(HttpStatusCode.OK, entity);
        } else {
            return Request.CreateErrorResponse(HttpStatusCode.NotFound, "User_Account with Town id = " + id.ToString() + " not found ");
        }
    }
}

这不只是：

 var entity = entities.User_Account.FirstOrDefault(e = > e.Town_Id == id);

需要成为

 var entity = entities.User_Account.Where(e = > e.Town_Id == id);

不同之处在于where子句选择所有匹配行，firstordefault只选择第一个匹配行

public HttpResponseMessage Get(string id) {
using(KWSB_dbEntities entities = new KWSB_dbEntities()) {
    entities.Configuration.ProxyCreationEnabled = false;
    entities.Configuration.LazyLoadingEnabled = false;
    var entity = entities.User_Account.FirstOrDefault(e = > e.Town_Id == id);

    if (entity != null) {
        return Request.CreateResponse(HttpStatusCode.OK, entity);
    } else {
        return Request.CreateErrorResponse(HttpStatusCode.NotFound, "User_Account with Town id = " + id.ToString() + " not found ");
    }
}

---

}

我尝试了上述建议，但在浏览器上出现了此错误。“$id:”1“，”消息“：”发生错误“，”异常消息“：”ObjectContent“1”类型未能序列化内容类型“application/json；charset=utf-8”的响应正文。”