Hastlayer-SDK

using System.Linq;

namespace System
{
    public static class StringExtensions
    {
        /// <summary>
        /// Turns a camelCase or PascalCase token into snake_Case.
        /// </summary>
        /// <param name="input">The input in camelCase or PascalCase.</param>
        /// <returns>
        /// The input converted to snake_Case. It doesn't alter case so you can call either ToUpper or ToLower without
        /// any additional penalties.
        /// </returns>
        /// <remarks><para><see href="https://stackoverflow.com/a/18781533">Source</see>.</para></remarks>
        public static string ToSnakeCase(this string input) =>
            string.Concat(input.Select((x, i) => i > 0 && char.IsUpper(x) ? "_" + x : x.ToString()));
    }
}