如何计算使用linq查询读取的数据集中表中的总计数

Question

下面是我的查询，我根据某些条件使用Linq连接几个表

var Info = from tblcol1 in Table1
           join tblcol2 in dc.Table2 on tblcol1.EmailID equals tblcol2.EmailID
           join tblcol3 in dc.Table3 on tblcol1.EmailID equals tblcol3.EmailID
           join tblcol4 in dc.Table4 on tblcol3.GroupID equals tblcol4.GroupID
           join tblcol5 in dc.Table5 on tblcol4.RID equals tblcol5.RID
           join tblcol6 in dc.Table6 on tblcol2.RID equals tblcol6.RID
           join tblcol7 in dc.Table7 on tblcol1.EmailID equals tblcol7.EmailID
           where tblcol1.UserId.Equals(gUserID)
           select new Class1()
           {
               EmailID = tblcol1.EmailID.ToString(),
               EmailName = tblcol1.Name.ToString(),
               OpenCount = tblcol7.OpenCount,
               ReadCount = tblcol7.ReadCount,
               TotalCount = tblcol5.RID + tblcol6.RID,
               UnsubscribeCount = tblcol6.IsUnsubscribed + tblcol5.IsUnsubscribed,
           };
List = Info.ToList();

其中RID是GUID（C＃）/唯一标识符（SQL），IsUnsubscribed是SQL数据表中的位。

我需要在上面的查询中计算TotalCount和UnsubscribedCount。

TotalCount = tblcol5.RID + tblcol6.RID,
UnsubscribeCount = tblcol6.IsUnsubscribed + tblcol5.IsUnsubscribed,

我该如何做到这一点？