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POC# "Object reference not set to an instance of an object."
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  1. POC# "Object reference not set to an instance of an object."
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    copied!<p>I get that error when I attempt to use the btn connected to it:</p> <pre><code>private void btnAccel_Click(object sender, EventArgs e) { pStatus.Text = plane.speed.ToString(); plane.speed = double.Parse(txtSpeed.Text); plane.Accelerate(); pStatus.Text = plane.speed.ToString(); } </code></pre> <p>pStatus is a panel I use and update the current speed before and after I increase the speed. <code>plane</code> is defined above as :</p> <pre><code>Airplane plane = new Airplane(); </code></pre> <p>The error seems to happen when it gets to <code>plane.Accelerate();</code></p> <pre><code>public void Accelerate() { // increase the speed of the airplane if (PlanePosition.speed &lt; Position.MAX_SPEED) { PlanePosition.speed = PlanePosition.speed + 1; // or speed += 1; }//end of if numberCreated++; // increment the numberCreated each time an Airplane object is created }//end of public Accelerate() </code></pre> <p>That first line <code>if(PlanePosition.speed &lt; Position.MAX_SPEED)</code> is where it keeps happening from what VS is telling me.</p> <hr> <pre><code>//private variables private string name{get; set;} private Position planePosition; private static int numberCreated; //default constructor public Airplane() { }//end of public Airplane public Position PlanePosition{get;set;} class Position { //private variables internal int x_coordinate; internal int y_coordinate; internal double speed; internal int direction; internal const int MAX_SPEED = 50; //default constructor public Position() { }//end of public Position public string displayPosition() { return "okay"; }//end of public string displayPosition() }//end of class Position </code></pre>
 

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