1、全部用WriteLine()函数

源程序：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
namespace test
{
    
    
    internal class Program
    {
    
    
        static void Main(string[] args)
        {
    
    
            Console.WriteLine("**********");
            Console.WriteLine("*        *");
            Console.WriteLine("*        *");
            Console.WriteLine("*        *");
            Console.WriteLine("*        *");
            Console.WriteLine("*        *");
            Console.WriteLine("*        *");
            Console.WriteLine("*        *");
            Console.WriteLine("*        *");
            Console.WriteLine("**********");
        }
    }
}

2、WriteLine()和Write()同时使用

源程序：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
namespace test
{
    
    
    internal class Program
    {
    
    
        static void Main(string[] args)
        {
    
    
            Console.Write("**********");
            Console.WriteLine();
            Console.Write("*        *");
            Console.WriteLine();
            Console.Write("*        *");
            Console.WriteLine();
            Console.Write("*        *");
            Console.WriteLine();
            Console.Write("*        *");
            Console.WriteLine();
            Console.Write("*        *");
            Console.WriteLine();
            Console.Write("*        *");
            Console.WriteLine();
            Console.Write("*        *");
            Console.WriteLine();
            Console.Write("*        *");
            Console.WriteLine();
            Console.Write("**********");
            Console.WriteLine();
        }
    }
}

3、WriteLine()和Write()结合循环结构

源程序：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
namespace test
{
    
    
    internal class Program
    {
    
    
        static void Main(string[] args)
        {
    
    
            int i = 0; 
            int j = 0; 

            //打印第一排10个:9+1
            for (i=0;i<9;i++)
            {
    
    
                Console.Write("*");//打印9个*
            }
            Console.WriteLine("*");//打印1个*并换行


            //打印中间8行
            for (i = 0; i < 8; i++)
            {
    
    
                Console.Write("*");//打印首
                for (j = 0; j < 8; j++)
                {
    
    
                    Console.Write(" ");//打印中部的8个空格
                }
                Console.WriteLine("*");//打印尾并换行
            }


            //打印最后一排10个:9+1
            for (i = 0; i < 9; i++)
            {
    
    
                Console.Write("*");//打印9个*
            }
            Console.WriteLine("*");//打印1个*并换行
        }
    }
}

运行效果：