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    <p>To expose the instance of <code>Map</code> in your <code>MapController</code> either make it a public field, or put it in a property. example:</p> <pre><code>public class MapController { public MapController() { } //here you make it "public" so it is visible to outside classes public Map map = new Map(); // the rest of your code for this class... </code></pre> <p>Then to access that instance (assuming you are holding onto an instance of the controller)</p> <pre><code>var controller = new MapController(); controller.map.rows = 5; // now you can access that instance of map. controller.map.rows = 123; </code></pre> <p>Now, to inject the Map into the controller (meaning that it is newed up somewhere else in your code, and the same instance can then be shared accross multiple classes using similar injection procedures) you would do something like this...</p> <pre><code>public class MapController { //here you make it "private" cause it doesn't need to be public anymore, //you also don't new it up here, you are passing in a new on during construction. private Map map; public MapController(Map map) { this.map = map } // the rest of your code for this class... </code></pre> <p>Now in the code where you new up the objects and stuff...</p> <pre><code>var map = new Map(); var controller = new MapController(map); map.rows = 5; // now you can access that instance of map. map.rows = 123; // and you can easily share that same instance with other classes var otherClass = new SomeOtherClassThatNeedsTheMap(map); </code></pre>
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    1. COThanks! How do i set the map instance to a variable in other classes as that instance so that i don't have to write controller each time? It is referenced a lot. eg Map map = controller.Map();
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    2. COThat will really depend on the code structure, but there are several ways to do it. It sounds to me like you basically want to use the same map all over the place in your code. I would suggest not creating it in the controller, but `injecting` it into the controller. I'll update my answer to show you how that works.
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    3. COBut if you did want to leave the construction in the controller, and just then capture that instance into a variable somewhere else for ease of use, you just do this `var map = controller.map;` (assuming that you left the code with `map` being public on the controller)
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