Use C# regex to convert casing in a string

Question

how can I convert this string:

bKk_035A_paint-House_V003
to
BKK_035a_paint-House_v003

with a regular expression (e.g. Regex.R

Answer 1

Another alternative using Split and Join methods.

    const string input = "bKk_035A_paint-House_V003";
    string[] strParts = input.Split('_');
    strParts[0] = strParts[0].ToUpperInvariant();
    strParts[1] = strParts[1].ToLowerInvariant();
    strParts[3] = strParts[3].ToLowerInvariant();
    string result = String.Join("_", strParts);