public void CheckNullTest()
{
TrialClass t = null;
Assert.IsTrue(t.TestNullBeforeEquals(null, () => false));
TrialClass t2 = null;
Assert.IsTrue(t.TestNullBeforeEquals(t2, () => false));
t2 = new DerivedTrialClassB(10, 10);
Assert.IsFalse(t.TestNullBeforeEquals(t2, () => true));
t = t2;
Assert.IsTrue(t.TestNullBeforeEquals(t2, () => false));
t = new DerivedTrialClassB(2, 2);
Assert.IsTrue(t.TestNullBeforeEquals(t2, () => true));
}
public override bool Equals(TrialClass other) => Equals(other as DerivedTrialClassC);
