using System;
using static System.Console;
public class Program {
public static void Main() {
WriteLine("HelloWorld".ToCamelCase());
}
}
namespace System {
public static class StringExt {
public static string ToCamelCase(this string text) => char.ToLower(text[0]) + text.Substring(1);
}
}
//https://pt.stackoverflow.com/q/41944/101
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