Unity TakeScreenshot

Screenshot.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Screenshot : MonoBehaviour
{
    private int index = 0;
    
    // Start is called before the first frame update
    void Start()
    {
    }

    // Update is called once per frame
    void Update()
    {
    }

    public void OnScreenshotButton()
    {
        StartCoroutine(CaptureScreen());
    }

    private IEnumerator CaptureScreen()
    {
        // Wait till the last possible moment before screen rendering to hide the UI
        yield return null;
        GameObject.Find("Canvas").GetComponent<Canvas>().enabled = false;

        // Wait for screen rendering to complete
        yield return new WaitForEndOfFrame();

        index++;
        // Take screenshot
        ScreenCapture.CaptureScreenshot(@"screenshot" + index.ToString("D3") + ".png");

        // Show UI after we're done
        GameObject.Find("Canvas").GetComponent<Canvas>().enabled = true;
    }
}