如何编写一个while循环来验证用户输入正值

犯了大量错误，可能做错了。我正在使用visual studio和C＃语言。 app.config

Getting a ton of errors and probably doing this all wrong. I'm using visual studio and C# language. app.config

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace positive
{
    class Program
    {
        static void Main(string[] args)
        {
            System.out.print("Enter a positive integer: ");
            number = scan.nextInt();
            while (number <= 0)
            
                System.out.print("Enter a positive integer: ");
                number = scan.nextInt();
        }
    }
}