Screenshot from camera

I take an image from camera with screen shot but when I want to get an image from the camera again, no screen shots content.

Texture2D screenCap; void Start() { screenCap = new Texture2D(200, 200, TextureFormat.RGB24, false); } void OnGUI() { if (shot) {
GUI.DrawTexture(new Rect(230, 700, 230, 200), screenCap, ScaleMode.StretchToFill); } } IEnumerator Capture() { yield return new WaitForEndOfFrame(); screenCap.ReadPixels(new Rect(280, 400, 260, 198), 0, 0); screenCap.Apply(); shot = true; } public void okey() { StartCoroutine("Capture");

 }

public void buttonagainnewTexture() {

     Destroy(screenCap);
     eee.SetActive(true);
     koooo = false;
 }
 public void StartCam_Clicked()
 {
   
         WebCamDevice device = WebCamTexture.devices[currentCamIndex];
         tex = new WebCamTexture(device.name);
         display.texture = tex;
         tex.Play();
    
 }