c#控制台应用程序，麻烦各位帮我写写

Question

实现用星号围成一个矩形，矩形中间有文字。请各位帮我写一下代码 我无从下手

Answer 1

string s = "hello world";
Console.WriteLine(new string('*', s.Length+2));
Console.WriteLine("*" + s + "*" );
Console.WriteLine(new string('*', s.Length+2));