As an addition to the "Property-calls-itself" remarks, in the latest C# version you can covert such given simple properties to an auto-property:
public class myClass
{
public myClass()
{
this.IsAuthenticated = false;
}
public bool IsAuthenticated { get; set; }
}
Edit: changed capitalization of the property, C# naming conventions calls for capital letters as starting letters of a public field or property.