如何遍历行，然后组合值

当前是根据干警信息表中的电话来组合成s这个值，想实现多个电话组合成类似1,2,3,4,5,6,7,8,9,0

Dim t1 As Table=Tables("测试_table2")
Dim t2 As Table=Tables("云mas告知内容")
Dim Products As List(Of String) = DataTables("干警信息").GetValues("电话")
Dim ba As New Jarray
Dim s As String
Dim sysss As List(Of String()) = DataTables("sys").GetValues("ecName|apid|sign|addserial|secretKey")
Dim t11 As WinForm.TextBox = e.Form.Controls("TextBox1")
For i As Integer = 0 To Products.Count - 1
    ba.Add(Products(i))
    output.show(Products(i))
    t2.addnew
    t2.Current("mobiles")=Products(i)
    If ba.Count = 3 OrElse i = Products.Count - 1 Then
        \'output.show(Products(i))
        output.show(ba.ToString())
        s=ba.ToString()
        s=s.Replace("""","")
        s=s.Replace("[","")
        s=s.Replace("]","")
        s=s.Replace("\\r","")
        s=s.Replace("\\n","")
        s=s.Replace(" ","")
        s=s.TrimStart
        s=s.TrimEnd
        output.show(s)
        ba = New Jarray
        t1.addnew
        t1.Current("mobiles")=s
        For Each syss As String() In sysss
            t1.Current("ecName")=syss(0)
            t1.Current("apid")=syss(1)
            t1.Current("sign")=syss(2)
            t1.Current("addserial")=syss(3)
            t1.Current("secretKey")=syss(4)
            t1.Current("content")=t11.text     
        Next
    End If
Next

得到的s是如下格式：

1234567890，

3124556666，

4234124111，

有没有办法直接成为

1234567890，3124556666，4234124111，  且末尾一个， 去掉