public void TestEquals()
{
var a = new GlobalPosition(c1);
Assert.IsFalse(a.Equals(null));
object s = "x";
Assert.IsFalse(a.Equals(s));
var b = new GlobalPosition(c1);
Assert.IsTrue(a.Equals(b));
b.Elevation = b.Elevation + 1;
Assert.IsFalse(a.Equals(b));
}