struct in memory explanation

[boazevental]

i read about the struct variables in the memory and i didnt understand
when i calls to struct that i made for example :

 public struct CarType
    {
        private string Color;
        private string car_type;
        private string car_model;
        private int speed;
        private bool starter;


        public void SetColor(string Color)
        {
            this.Color = Color;
        }
        
    }

then the compiler automaticly creat 5 copy of the variables(from the struct) in the stack? or it creat a copy of the variables only when i calls method that use a variable from the struct , for example

  public void SetColor(string Color)
        {
            this.Color = Color;
        }