How Can Optional Parameters Simplify C# Method Arguments?

Using optional parameters in C#

Optional parameters provide a convenient mechanism for defining methods with a variable number of parameters. Prior to C# 4, the language did not natively support this feature. To work around this limitation, the following approach can be used:

Suppose we want to create an API method called "GetFooBar" that accepts two query parameters ("a" and "b") to retrieve data from a C# class. Initially, the class method "GetFooBar(int a, int b)" defines two required parameters.

To introduce optional parameters, we can leverage features introduced in C# 4 and above. Using optional parameters allows us to specify default values ​​for method parameters. By defining the second parameter as int b = 0, we can make it optional and assign a default value of 0 when not provided explicitly.

The modified method declaration looks like this:

<code class="language-c#">public void SomeMethod(int a, int b = 0)
{
   //some code
}</code>

This allows us to call the "GetFooBar" method with or without providing the "b" parameter. When the argument is omitted, the default value (0) is used.

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