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program.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace hello

{


class Program

{


static void Main(string[] args)

{


Console.WriteLine(“Hello world!”);

Console.BackgroundColor = ConsoleColor.DarkBlue;

Class1.laiqian();

Console.ReadLine();

}

}

}

class1.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace hello

{


class Class1

{


public static void laiqian()

{


Console.WriteLine(“我是很新的新手！”);

}

}

}