if (x in (1, 2, 3)) 
if (x in 1:5)
if (x between(1,5))

   
 public Tuple<string, int, double> ReturnMyTuple() 
 { 
    return "Hello World!", 42, 4.2; 
 } 
 
 // elsewhere: item1 is a string, item2 is an int, item3 is a double.  
 var item1, item2, item3 = ReturnMyTuple(); 
 

 switch (anInt) 
 { 
        case 1, 2:  
            Console.WriteLine("1 or 2"); 
            break; 
        case 3..9: 
            Console.WriteLine("3 to 9"); 
            break; 
        case >= 10: 
            Console.WriteLine("10 or higher"); 
            break; 
        default: 
            ... 
 } 

 switch (aString) 
 { 
        case "one", "two": 
            Console.WriteLine("1 or 2"); 
            break; 
        case "three": 
            Console.WriteLine("3"); 
            break; 
        default: 
            ... 
 } 

 
    switch (aString) 
    { 
        case .IsNullOrEmpty(): 
            ... 
        case .Length > 100: 
            ... 
        case .Contains("foo"): 
            ... 
     } 

Void DoX(MyClass! obj) { … }
// The following would make the compiler say: 
// "Cannot convert string to string!, an explicit conversion exists
string! nonNullable = someFunctionThatReturnsAString();

DelegateType! DelegateVar;

// Instead of doing:
var obj = Foo(); 
Bar value = null; 
if(obj.Bar != null && obj.Bar.Something != null) 
{ 
  value = obj.Bar.Something.DoSomething(); 
} 
//You can do this with Groovy's null safe member operator ?.
var obj = Foo(); 
var value = obj?.Bar?.Something?.DoSomething();