A class can have static constructor and public constructor,If yes then how it will be called

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

namespace ConstructorCallingStaticAndPublicConstructor
{
    class Program
    {
        static Program()
        {
            Console.WriteLine("static constructor called");
        }

        public Program()
        {
            Console.WriteLine("public constructor called");
        }
        static void Main(string[] args)
        {
            Program p = new Program();

            Console.ReadLine();
        }
    }
}

output:-

static constructor called

public constructor called

Flow of execution:-

Once class is loaded into memory by CLR then static constructor will be called automatically at only once.

now control of execution moves to main method and execute Program p=new Program();

at this point public constructor will be called.

Note: if comment Program p=new Program() line

then only one static contructor will be called when code will be run.