convert this please into c#

Questions & Answers
1

var HP = 50.0;

function ApplyDamage(damage) {
HP -= damage;
if (HP <0) Destroy(gameObject);
}
2

float HP = 50.0f;

void ApplyDamage(float damage){
  HP -= damage;
  if(HP < 0) {
    Destroy(gameObject);
  }
}