using System;
using System.Linq;
using System.Collections.Generic;
class Program
{
static void Main() {
var dict = new Dictionary<string, int>();
dict["c++"] = 10;
dict["c#"] = 20;
dict["java"] = 30;
string s = string.Join("; ", dict.Select(entry => $"{entry.Key}: {entry.Value}"));
Console.WriteLine(s);
}
}
/*
run:
c++: 10; c#: 20; java: 30
*/