Csharp notes

The out Operator in C#

• pass arguments to methods by reference.
• It’s particularly useful when a method needs to
  1. return multiple values
  2. void copying large data structures.

int width = 5;
int calculatedArea;
CalculateArea(width, out calculatedArea);

Auto-Implemented Properties

    public class EnergyComponent
    {
        public float MaxEnergy { get; set; }
        public float currentEnergy { get; set; } = 10f;
        public EnergyComponent(float maxEnergy)
        {
            MaxEnergy = maxEnergy;
        }
    }

To make objects immutable:

• only a get accessor, or
• set accessor as private.
• init accessors ? @TODO

Misc

• null!: the “null-forgiving” operator (reference). When an expression can’t be null but the compiler can’t tell.
  • Instances of a class can always be null
  • Instances of a struct need to be wrapped in Nullable ( FooStruct? myStruct).
    • When wrapping in a Nullable, use HasValue and Value.
    • not != null and myStruct!.

[Export]
private FooObject _object = null!;