using System;
using System.Text;
using System.Collections.Generic;
public class Program
{
public static string convertToString(IList<char> list) {
StringBuilder sb = new StringBuilder();
foreach (char ch in list) {
sb.Append(ch);
}
return sb.ToString();
}
public static void Main(string[] args)
{
var list = new List<char>() {'a', 'b', 'c', 'd', 'e', 'f', 'g'};
string str = convertToString(list);
Console.WriteLine(str);
}
}
/*
run:
abcdefg
*/