Screen.resolutions

설명

Returns all full-screen resolutions that the monitor supports (Read Only).

Unity returns the resolutions the monitor supports and sorts them by width and then by ascending resolution. Important: When you use FullScreenMode.ExclusiveFullScreen you should use Screen.resolutions to determine which resolution to pass to Screen.SetResolution because FullScreenMode.ExclusiveFullScreen only works with supported resolutions. If you pass a non-supported resolution, it has a severe impact on performance. All other fullscreen modes support arbitrary resolutions without performance penalties.

using UnityEngine;

public class ExampleScript : MonoBehaviour
{
    void Start()
    {
        Resolution[] resolutions = Screen.resolutions;

        // Print the resolutions
        foreach (var res in resolutions)
        {
            Debug.Log(res.width + "x" + res.height + " : " + res.refreshRateRatio);
        }
    }
}

Additional resources: Resolution structure, SetResolution.