public class ExceptionLog : MonoBehaviour

{

    private System.IO.StreamWriter SW;

    private string LogFileNmae = "PYJ.txt";

    // Use this for initialization

    void Start ()

    {

        SW = new System.IO.StreamWriter(Application.persistentDataPath + "/" + LogFileNmae);

    }

    private void OnEnable()

    {

        Application.logMessageReceived+=HandleLog;

    }

    // Update is called once per frame

    void Update()

    {

//예외 의도적 발생 (0으로 나눔)

        if (Input.GetKeyDown(KeyCode.Return))

        {

            int x = 10;

            int z = 0;

            int k = x / z;

            Destroy(this.gameObject, 1.0f);

        }

}

    private void OnDisable()

    {       

        Application.logMessageReceived += null;

    }

    void HandleLog(string logString,string stackTrace,LogType type)

    {

        if (type == LogType.Exception || type == LogType.Error)

        {          

            SW.WriteLine("Logged at : " + System.DateTime.Now.ToString()

                + " -  Log Desc: " + logString

                + " - Trace: " + stackTrace

                + " - Type: " + type.ToString()

                );

        }

    }

    private void OnDestroy()

    {

        Debug.Log("기록완료");

        SW.Close();

    }

}

핵심 : HandleLog,딜리게이트를 이용해 예외가 발생했을 경우  Application.persistentDataPath 경로에 오류 내용을 기록.

빌드후 버그를 확인할때 사용하면 좋음

참고 

https://forum.unity3d.com/threads/getting-ctrl-to-work-within-vs.372584/