Create an instance of CoreMotion.CMMotionManager, and begin listening to updates from the Accelerometer with the method StartAccelerometerUpdates:

The following code snippet will display the accelerometer data for each axis in UILabels:

motionManager = new CMMotionManager ();
motionManager.StartAccelerometerUpdates (NSOperationQueue.CurrentQueue, (data, error) =>
{
       this.lblX.Text = data.Acceleration.X.ToString ("0.00000000");
       this.lblY.Text = data.Acceleration.Y.ToString ("0.00000000");
       this.lblZ.Text = data.Acceleration.Z.ToString ("0.00000000");
});

The first parameter, data is a CMAccelerometerData instance holding the accelerometer data for the event.

The CoreMotion.CMMotionManager class is a gateway to the motion services provided by iOS. An application should only have a single instance of the CMMotionManager class.

The iOS simulator has no support for the features from Core Motion – the code may only be tested on a device.