Bind a key to take a screen shot for

ScreenShot.cs

using UnityEngine;
using System.Collections;

public class ScreenShot : MonoBehaviour {

    //Default is None, you should set this to whatever you want in the inspector
    public KeyCode screenshotKey = KeyCode.None;

    // Use this for initialization
    void Start () {
        if (screenshotKey == KeyCode.None)
        {
            Debug.LogWarning("No screenshot key assigned, disabling screenshot component");
            enabled = false;
        }
    }
	
	// Update is called once per frame
	void Update () {
        CheckForScreenshot();
	}

    void CheckForScreenshot()
    {
        if (Input.GetKeyUp(screenshotKey)) {
            //            string filename = "screenshot-" + System.DateTime.Now.ToString("yyyy-MM-dd-hh-mm-ss") + ".png";
            string filename = "screenshot-" + System.DateTime.Now.ToString("yyyyMMddhhmmss") + ".png";
            Application.CaptureScreenshot(filename);
            //NOTE: If this is running in the unity editor the file will actually be saved in the root of the project
            Debug.Log("Screenshot: " + Application.persistentDataPath + "/" + filename);

        }
    }
}