正則運算的問題

Question

問題如下:

字串:  

"plum * pear * BALL"

要將以上字串轉成下面的正則

regex :    

plum & ".*" pear & ".*" BALL

.*代表的是任何字元

做這樣的正則我的應用是用來搜索匹配類似下面的集合 

plum IS pear ON BALL

plum ARE pear ON BALL

下面是我目前寫的代碼   

 Public Sub main6()

        Dim regex As Regex = New Regex(" ")         ' Split on hyphens.
        Dim substrings() As String = regex.Split("plum * pear * BALL")
        Dim c As String = vbNullString

        For Each match As String In substrings
            If match = "*" Then
                match = "'.*'"
            End If

            'Me.RichTextBox1.Text += match & vbCrLf
            c += match & " & "
        Next
        Dim c1 As String = c.Trim(" ")
        c1 = c1.Trim("&")
        c1 = c1.Trim(" ")
        Dim regex1 As Regex = New Regex(c1)
        Me.RichTextBox1.Text = c1

    End Sub
   

目前這樣處理出來的regex 會變成

plum & '.*' pear & '.*' BALL

這樣的正則做匹配 好像會有問題呢?  本來應該是 " 符號 只能用 ' 符號 ..

可是又不曉得如何將 '.*' 改成 ".*" 組進正則裡面.

請問各位大大有無解法?