C #4.0 optional and named Parameters

Optional parameters are supported in C #4.0. Assign a constant to a parameter when declaring a method. You do not need to specify each parameter when calling this method.

 

Public   Class A

{

Public Static VoidMain ()

{

//Call the functiona Method

Functiona (StringStr );

}

Public VoidFunctiona (StringA,IntI=1)

{

Do.......

}

}

 

Note:

1. Optional parameters must be placed behind all required parameters (that is, parameters without default values.

2. The default value is a constant.

 

Name parameters when calling another method in C #4.0.

You can assign values to the specified parameter names.

 

Code

Public   Class A

{

Public Static VoidMain ()

{

//Call the functiona Method

Functiona (:"Stringa", C: intc );

}

Public VoidFunctiona (StringA,StringB=Default(String),IntC= Default(Int))

{

Do.......

}

}

 

When you see the optional parameters, naming parameters, and method overloading in the application system, it is difficult to distinguish which method to call.