Hello im doing a project for a big exam and my teacher and i thought was working but its not, Can anyone suggest anything

i getting these errors

jdoodle.cs(11,10): error CS0103: The name `Console' does not exist in the current context
jdoodle.cs(12,27): error CS0103: The name `Console' does not exist in the current context
jdoodle.cs(12,55): error CS0103: The name `Console' does not exist in the current context
jdoodle.cs(13,23): error CS0103: The name `Convert' does not exist in the current context
jdoodle.cs(25,13): error CS0103: The name `Console' does not exist in the current context
jdoodle.cs(26,30): error CS0103: The name `Console' does not exist in the current context
jdoodle.cs(28,13): error CS0103: The name `Console' does not exist in the current context
jdoodle.cs(29,27): error CS0103: The name `Convert' does not exist in the current context
jdoodle.cs(32,10): error CS0103: The name `Console' does not exist in the current context
jdoodle.cs(33,10): error CS0103: The name `Console' does not exist in the current context
jdoodle.cs(34,10): error CS0103: The name `Console' does not exist in the current context
Compilation failed: 11 error(s), 0 warnings

`class Program
{
    static void Main() {
        string Overdue_member,Highest_overdue_member;
        double  Overdue_fee, Highest_overdue_fee, Total_Overdue_fee;
        Total_Overdue_fee = 0 ;
        Overdue_fee = 0;
        Highest_overdue_member = " ";
        Highest_overdue_fee = 0;
    
         Console.WriteLine("Enter overdue member");
         Overdue_member = Console.ReadLine();         
         Console.WriteLine("Enter overdue fee for              overdue member");
         Overdue_fee = Convert.ToInt32(Console.ReadLine());         
    
        while(Overdue_fee > 0)
                {
           if(Overdue_fee > Highest_overdue_fee)
                {
                Highest_overdue_fee = Overdue_fee;
                Highest_overdue_member = Overdue_member;
                }
            
            Total_Overdue_fee = Total_Overdue_fee + Overdue_fee;
        
            Console.WriteLine("please enter overdue member");
            Overdue_member = Console.ReadLine();
        
            Console.WriteLine("please enter overdue fee");
            Overdue_fee = Convert.ToInt32(Console.ReadLine());
        
         }
         Console.WriteLine("The highest overdue member is :" +Highest_overdue_member);
         Console.WriteLine("The highest overdue fee is :" +Highest_overdue_fee);
         Console.WriteLine("The total overdue fee :" +Total_Overdue_fee);
}
}

`