c# - Initialize an array of a class in a constructor -

i have class garage has property array of type car, class in program. i've tried several iterations , run-time errors on of them. nullrefernceexception whenever try run it. happens in program class try access length property of carlot array.

i know has carlot property of garage class being array instead of car. piece missing here array isn't set null when program tries use it?

class program {     static void main(string[] args)     {         garage g = new garage();         //this exception occurs         g.carlot[0] = new car(5, "car model");         console.readline();     } }  public class garage  {     public car[] carlot { get; set; }     public garage() { }     //this should able 0 or greater     public garage(params car[] c)     {         car[] cars = { };         carlot = cars;     } }  public class car {     public int vin { get; set; }     public int year { get; set; }     public string model { get; set; }     public car(int _vin, string _model)     {         _vin = vin;         _model = model;     }     public car() { }     public void print()     {         console.writeline("here information car {0} , {1} ");     } } 

instead of using auto property array, can use private variable initialize array when parameterless constructor called in main.

e.g.

private car[] carlot = new car[size]; public car[] carlot {      { return carlot; }      set { carlot = value; } } 

alternatively, in parameterless constructor garage can go ahead , initialize array @ point.

either way, array has instantiated before can assign values it. http://msdn.microsoft.com/en-us/library/aa288453(v=vs.71).aspx