String Extensions

StringExtensions.cs

using System.Linq;
using System.Text.RegularExpressions;

public static class StringExtensions
{
    public static string ToUpper(this string name, string separator)
    {
        string upper = Regex
           .Matches(name, "[A-Z][a-z]+")
           .Cast<Match>()
           .Select(m => m.Value)
           .Aggregate((acc, s) => string.Concat(acc, separator, s))
           .ToUpper();

        return upper;
    }

    public static string ToPascal(this string name, char separator)
    {
        string pascal = name
           .Split(separator)
           .Select(s => char.ToUpper(s[0]) + s.Substring(1).ToLower())
           .Aggregate((acc, s) => string.Concat(acc, "", s));

        return pascal;
    }
}