admin/Azaion.Common/StringExtensions.cs

using System.Text;

namespace Azaion.Common;

public static class StringExtensions
{
    public static string ToSnakeCase(this string text)
    {
        if (string.IsNullOrEmpty(text))
            return text;

        if (text.Length < 2)
            return text.ToLowerInvariant();

        var sb = new StringBuilder();
        sb.Append(char.ToLowerInvariant(text[0]));
        for (int i = 1; i < text.Length; ++i) {
            var c = text[i];
            if(char.IsUpper(c)) {
                sb.Append('_');
                sb.Append(char.ToLowerInvariant(c));
            } else {
                sb.Append(c);
            }
        }
        return sb.ToString();
    }
}