How can i change language version in Visual Studio 2017?

Questions & Answers
1

I’m having trouble with error “CS8025 C# Feature is not available in C# 4. Please use language version 7 or greater.”
This is my script and bold ones are in trouble.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class FireCtrl : MonoBehaviour {

public GameObject bullet;
public Transform firePos;

// Update is called once per frame
void Update () {
	if (Input.GetMouseButtonDown(0))
    {
        Fire();
    }

    void **Fire()**
    {
        CreateBullet();
    }

    void **CreateBullet()**
    {
        Instantiate(bullet, firePos.position, firePos.rotation);
    }
}

}

I’ve tried to change language version by going through properties - build - advanced, but properties window doesn’t open.

I installed visual studio yesterday and I can’t understand why there’s a language version problem.

Please help me.

2

You can’t. Unity uses Visual Studio just as code editor. Unity uses the Mono compiler that is shipped with the Unity editor to actually compile your scripts.

edit
However i don’t think you actually need any of the newer features. I think you accidentally declared The Firer and CreateBullet method inside the Update method. Just declare them outside of the Update body.