string companyname;
    string location;
    int taxnumber;
    int employeenumber;

    public string Companyname { get => companyname; set => companyname = value; }
    public string Location { get => location; set => location = value; }
    public int Taxnumber { get => taxnumber; set => taxnumber = value; }
    public int Employeenumber { get => employeenumber; set => employeenumber = value; }
}

public class Company{
      public   string Companyname{get;set;};
      public  string Location{get;set;};
      public  int Taxnumber{get;set;};
      public  int Employeenumber{get;set;};
    }

List<Company> companies=new List<Company>();