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copied!<p>First, let's hit your version with notes, then move on to what you probably wanted. </p> <pre><code>// Here you declare your DoSomething class public class DoSomething { // now you're defining a static function called Main // This function isn't associated with any specific instance // of your class. You can invoke it just from the type, // like: DoSomething.Main(...) public static void Main(System.String[] args) { // Here, you declare some variables that are only in scope // during the Main function, and assign them values System.String apple = args[0]; System.String orange = args[1]; System.String banana = args[2]; System.String peach = args[3]; } // at this point, the fruit variables are all out of scope - they // aren't members of your class, just variables in this function. // There are no variables out here in your class definition // There isn't a constructor for your class, so only the // default public one is available: DoSomething() } </code></pre> <p>Here's what you probably wanted for your class definition:</p> <pre><code>public class DoSomething { // The properties of the class. public string Apple; public string Orange; // A constructor with no parameters public DoSomething() { } // A constructor that takes parameter to set the properties public DoSomething(string apple, string orange) { Apple = apple; Orange = orange; } } </code></pre> <p>And then you could create / manipulate the class like the following. In each case, the instance will end up with Apple = "foo" and Orange = "bar"</p> <pre><code>DoSomething X = new DoSomething("foo", "bar"); DoSomething Y = new DoSomething(); Y.Apple = "foo"; Y.Orange = "bar"; DoSomething Z = new DoSomething() { Apple = "foo", Orange = "bar" }; </code></pre>

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