title: 'Input' does not contain a definition for 'GetMouseButton' how is this possible?
body: <p>I've wanted to try developing for touch screen but for some reason it said: </p>
  
  <blockquote>
    <p>'Input' does not contain a definition for 'touched'</p>
  </blockquote>
  
  <p>Then I tried with the old fashioned way, which worked for me a million times, but now doesn't.</p>
  
  <blockquote>
    <p>'Input' does not contain a definition for 'GetMouseButton'</p>
  </blockquote>
  
  <p>Does someone know the source of my problem?</p>
  
  <pre><code>    void Update() {
          if(Input.GetMouseButton(0))
              Debug.Log("Pressed left click.");
  
          if(Input.GetMouseButton(1))
              Debug.Log("Pressed right click.");
  
          if(Input.GetMouseButton(2))
              Debug.Log("Pressed middle click.");
  
      }
  </code></pre>