/// [CanBeNull] public object Test() { return null; }
/// public void UseTest() {
/// var p = Test();
/// var s = p.ToString(); // Warning: Possible 'System.NullReferenceException'
/// }
///
/// [NotNull] public object Foo() {
/// return null; // Warning: Possible 'null' assignment
/// }
///
/// [StringFormatMethod("message")]
/// public void ShowError(string message, params object[] args) { /* do something */ }
/// public void Foo() {
/// ShowError("Failed: {0}"); // Warning: Non-existing argument in format string
/// }
///
/// public void Foo(string param) {
/// if (param == null)
/// throw new ArgumentNullException("par"); // Warning: Cannot resolve symbol
/// }
///
/// public class Foo : INotifyPropertyChanged {
/// public event PropertyChangedEventHandler PropertyChanged;
/// [NotifyPropertyChangedInvocator]
/// protected virtual void NotifyChanged(string propertyName) { ... }
///
/// private string _name;
/// public string Name {
/// get { return _name; }
/// set { _name = value; NotifyChanged("LastName"); /* Warning */ }
/// }
/// }
///
/// Examples of generated notifications:
/// Function Definition Table syntax:
///
/// [ContractAnnotation("=> halt")]
/// public void TerminationMethod()
///
/// [ContractAnnotation("halt <= condition: false")]
/// public void Assert(bool condition, string text) // regular assertion method
///
/// [ContractAnnotation("s:null => true")]
/// public bool IsNullOrEmpty(string s) // string.IsNullOrEmpty()
///
/// // A method that returns null if the parameter is null,
/// // and not null if the parameter is not null
/// [ContractAnnotation("null => null; notnull => notnull")]
/// public object Transform(object data)
///
/// [ContractAnnotation("s:null=>false; =>true,result:notnull; =>false, result:null")]
/// public bool TryParse(string s, out Person result)
///
/// [LocalizationRequiredAttribute(true)]
/// public class Foo {
/// private string str = "my string"; // Warning: Localizable string
/// }
///
/// [CannotApplyEqualityOperator]
/// class NoEquality { }
/// class UsesNoEquality {
/// public void Test() {
/// var ca1 = new NoEquality();
/// var ca2 = new NoEquality();
/// if (ca1 != null) { // OK
/// bool condition = ca1 == ca2; // Warning
/// }
/// }
/// }
///
/// [BaseTypeRequired(typeof(IComponent)] // Specify requirement
/// public class ComponentAttribute : Attribute { }
/// [Component] // ComponentAttribute requires implementing IComponent interface
/// public class MyComponent : IComponent { }
///
/// [Pure] private int Multiply(int x, int y) { return x * y; }
/// public void Foo() {
/// const int a = 2, b = 2;
/// Multiply(a, b); // Waring: Return value of pure method is not used
/// }
///
/// [SourceTemplate]
/// public static void forEach<T>(this IEnumerable<T> xs) {
/// foreach (var x in xs) {
/// //$ $END$
/// }
/// }
///
///
/// [SourceTemplate, Macro(Target = "item", Expression = "suggestVariableName()")]
/// public static void forEach<T>(this IEnumerable<T> collection) {
/// foreach (var item in collection) {
/// //$ $END$
/// }
/// }
///
/// Applying the attribute on a template method parameter:
///
/// [SourceTemplate]
/// public static void something(this Entity x, [Macro(Expression = "guid()", Editable = -1)] string newguid) {
/// /*$ var $x$Id = "$newguid$" + x.ToString();
/// x.DoSomething($x$Id); */
/// }
///
///
/// [ActionName("Foo")]
/// public ActionResult Login(string returnUrl) {
/// ViewBag.ReturnUrl = Url.Action("Foo"); // OK
/// return RedirectToAction("Bar"); // Error: Cannot resolve action
/// }
///