Convert lower camelCase to PascalCase in c#?

Question

I need to convert camelcase keys to Pascal key and I got good solution from stackoverflow. But the issue is I don't know how to exclude . in conversion.

Please find the below example:

var input= "customer.presentAddress.streetName";

Expected Output is

var output= "Customer.PresentAddress.StreetName";

PlayGround : Please click here

Answer 1

An idea to use e.g. \b\p{Ll} (demo) for matching lower word's first letter and use a callback.

string output = Regex.Replace(input, @"\b\p{Ll}", match => match.Value.ToUpper());

See this C# demo at tio.run - \b is a word boundary and \p{Ll} matches lowercase letters.