Is there a case insensitive string replace in .Net without using Regex?

Question

I recently had to perform some string replacements in .net and found myself developing a regular expression replacement function for this purpose. After getting it to work I

Answer 1

A little off-topic maybe, but while case insensitive replacement is covered by the standard replace function since (?), here a little function that adds text before and/or after a substring without changing the case of the substring:

    Public Shared Function StrWrap(Haystack As String, Needle As String, Optional AddBefore As String = "", Optional AddAfter As String = "") As String
        Dim Index = Haystack.ToLower.IndexOf(Needle.ToLower)
        If Index < 0 Then Return Haystack
        Return Haystack.Substring(0, Index) + AddBefore + Haystack.Substring(Index, Needle.Length) + AddAfter + Haystack.Substring(Index + Needle.Length)
    End Function

Usage: StrWrap("Hello World Test", "hello", "Hi, ", " and Ahoi")

Result: "Hi, Hello and Ahoi World Test"

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Standard case insensitive replacement:

Replace("Hello World Test", "hello", "Hi", , Compare:=CompareMethod.Text)