.Net正则表达式在所有字符前添加空格

如何在每一个空格之前添加空格 & 和 - 字符,如果还没有?

我一直在网上寻找如何在替换值中保留原始字符:

Private Function fPhraseSpacesLeadingAdd() As String

    Dim strClsPhrase As String = "Cobb& Co is nice. Also so is M& Sheer and B- Cafe."

    'Desired output: "Cobb & Co is nice. Also so is M & Sheer and B - Cafe."

    Dim strReturn As String = strClsPhrase

    Dim strItems = New String() {"&", "-"}

    For Each strItem As String In strItems
        Dim rg1 As New Regex("." + strItem)
        strReturn = rg1.Replace(strReturn, "\1 " + strItem)
    Next

    Return strReturn

End Function

PS:之后,我想为以下内容创建单独的函数,但希望我能使用类似的代码来解决这些问题:

Function fSpaceTrailingAdd()
'Follow : ; , & with a single space if none there

和

Function fSpaceTrailingRemove() 
'Remove any spaces after $ “ ‘ ( [ {