better-genshin-impact/Build/MicaSetup/Helper/Device/FileWritableHelper.cs

using System.IO;

namespace MicaSetup.Helper;

public static class FileWritableHelper
{
    public static bool CheckWritable(string fileName)
    {
        if (!File.Exists(fileName))
        {
            return true;
        }

        try
        {
            using FileStream fileStream = new(fileName, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
            return fileStream.CanWrite;
        }
        catch
        {
            return false;
        }
    }
}