Ylbtech-languagesamples-namedandoptional (named and optional parameters)

Ylbtech-microsoft-csharpsamples:ylbtech-languagesamples-namedandoptional (named and optional parameters)

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Named and optional parameters

C # 4.0 supports named and optional parameters. This program demonstrates how to declare a method with a named and optional parameter, and how to invoke the method by using the default value of the parameter and by explicitly naming a specific parameter.

1.B, sample code back to top

1.b.1, Program.cs

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespacenamedandoptional{//This program demonstrates how to use a method that declares a named parameter and an optional parameter.//and how to explicitly use it while calling the method//named parameters and optional parameters.     classProgram {//methods with named parameters and optional parameters         Public Static voidSearch (stringNameintAge = +,stringCity ="Pueblo") {Console.WriteLine ("Name = {0}-age = {1}-city = {2}", name, age, city); }        Static voidMain (string[] args) {            //Standard CallSearch ("Sue", A,"New York"); //Omit City parameterSearch ("Mark", at); //To explicitly name the city parameterSearch ("Lucy", City:"Cairo"); //use named parameters in reverse orderSearch ("Pedro", Age: $, City:"Saigon"); }    }}

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1.b.2,

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Ylbtech-languagesamples-namedandoptional (named and optional parameters)