C # out and ref keywords

Using  System;  Using  System. Collections. Generic;  Using  System. LINQ;  Using  System. text;  Using  System. Threading. tasks;  Namespace  Study {  Public   Class  Program {  ///  <Summary>          ///  The ref keyword allows input of a value type to be passed by reference.  ///   </Summary>          Private   Static   Void Reffunction ( Int X, Ref   Int  A) { = * X ;}  ///   <Summary>         ///  Use of the out keyword  ///  With the out keyword, you do not need to initialize the input parameter STR before it is passed to the outkeyword () method. If there is no keyword, it cannot be compiled.  ///   </Summary>          Private   Static   Void Outkeyword ( Out   String  Str ){  //  The output parameter STR must be assigned a value before returning the method. STR ="  A string  "  ;}  Static   Void Main ( String  [] ARGs ){  //  * ********** Use of the ref keyword              Int X = 12 , A = 5  ; Console. writeline ();  // Output: 5 Reffunction (X, Ref  A); console. writeline ();  //  Output: 60  //  * ********** Use of the out keyword              String STR; //  No initialization required Outkeyword ( Out Str ); //  Output: a string Console. writeline (STR); console. readkey ();}}} 

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