Screenshot Script for Unity

using UnityEngine;
using System.Collections;

public class Screenshot : MonoBehaviour {

    public string prefname="LastScreenshotNumber";
    public string screenshotprefix;
    public string screenshotsuffix;
    public int startAtShot=100;
    public float ssDelay=1f;
    public KeyCode ssKey=KeyCode.F2;
    float nextSSAt;

    // Use this for initialization
    void Start () {
        if (!PlayerPrefs.HasKey(prefname)){
            PlayerPrefs.SetInt(prefname,startAtShot);
        }
    }

    // Update is called once per frame
    void Update () {
        if (Input.GetKey(ssKey)&&Time.timeSinceLevelLoad>=nextSSAt){
            int cshotn=PlayerPrefs.GetInt(prefname);
            cshotn++;
            string ssname=Application.dataPath+"/"+screenshotprefix+cshotn.ToString()+screenshotsuffix+".png";
            Debug.Log ("Taking screenshot "+ssname);
            Application.CaptureScreenshot( ssname);
            PlayerPrefs.SetInt(prefname,cshotn);
            nextSSAt=Time.timeSinceLevelLoad+ssDelay;
        }
    }
}