C # group meta Tuple

C # group meta Tuple

Group Meta is a new feature introduced by C #4.0. It must be Based on. NET Framework 4.0 or later. Group elements use generics to simplify the definition of a class. Group elements are mostly used

Method return value. If a function returns multiple types, it does not use output parameters such as out \ ref. You can directly define a Tuple type.

1.0 simple use

// A member Tuple
 
  
Test = new Tuple
  
   
(1); Console. WriteLine (test. Item1); // two members, Tuple
   
    
Test1 = new Tuple
    
     
(2, 2.3); Console. WriteLine (test1.Item1 + test1.Item2 );
    
   
  
 

2.0 nested use

TupleA maximum of 8 members are supported.If there are more than eight, nesting is required.

Note that 8th members are special. 8th members must be nested into the Tuple type.

// Non-8 elements, Tuple
 
  
> Test2 = new Tuple
  
   
> (3, new Tuple
   
    
("Nesting"); Console. WriteLine (test2.Item1); Console. WriteLine (test2.Item2); // eight elements Tuple
    
     
> Test3 = new Tuple
     
      
> (1, 2, 3.0f, 4, 5, 6, 'h', new Tuple
      
        (8); Console. WriteLine (test3.Item1 + test3.Rest. Item1 );