How to easily output check results

CheckTool.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System.IO;
using System.Text;

public class _CheckTool {

    [MenuItem("CheckTool/Check")]
    public static void Check()
    {
        StringBuilder sb = new StringBuilder();
        //TODO some check
        Write(sb.ToString());
    }

    private static void Write(string output)
    {
        StreamWriter writer = new StreamWriter("Assets/result.txt", false);
        writer.Write(output);
        writer.Close();

        Debug.Log(output);
    }
}