public void MathContextStacking()
{
MathContext c1 = MathContext.Current;
Assert.IsNotNull(c1, "01");
Assert.AreNotEqual(Guid.Empty, c1.InstanceId, "02");
Guid id1 = c1.InstanceId;
Assert.AreEqual(id1, MathContext.Current.InstanceId, "03");
Assert.AreEqual(false, c1.HasParent, "04");
Assert.IsNull(c1.ParentContext, "05");
using (MathContext c2 = MathContext.Create())
{
Assert.IsNotNull(c2, "06");
Assert.AreNotEqual(Guid.Empty, c2.InstanceId, "07");
Assert.AreNotEqual(c1.InstanceId, c2.InstanceId, "08");
Assert.AreEqual(true, c2.HasParent, "09");
Assert.AreEqual(c1.InstanceId, c2.ParentContext.InstanceId, "10");
Assert.AreEqual(id1, c1.InstanceId, "11");
Assert.AreEqual(c2.InstanceId, MathContext.Current.InstanceId, "12");
}
Assert.AreEqual(id1, MathContext.Current.InstanceId, "13");
Assert.AreEqual(id1, c1.InstanceId, "14");
}
