Screenshot extension for Unity Editor

Screenshot.cs

/**
Screenshot.cs

Copyright (c) 2016 Hassaku

This software is released under the MIT License.
http://opensource.org/licenses/mit-license.php
*/
using UnityEngine;
using UnityEditor;

public class Screenshot : EditorWindow{

    [MenuItem ("Extension/Screenshot")]
    public static void Capture() {
        if (!EditorApplication.isPlaying) return;
        string filename = System.DateTime.Now.ToString("yyyy-MM-dd_hh-mm-ss") + ".png";
        Application.CaptureScreenshot(filename);
    }
}