sebastienros.jint/Jint/Extensions/JavascriptExtensions.cs

namespace Jint.Extensions
{
    internal static class JavascriptExtensions
    {
        internal static string UpperToLowerCamelCase(this string str)
        {
            if (char.IsLower(str[0]))
            {
                return str;
            }

            var arr = str.ToCharArray();
            arr[0] = char.ToLowerInvariant(arr[0]);
            return new string(arr);
        }
    }
}