How to use parameter arguments in C#

The params keyword in C# allows you to specify a method parameter that takes a variable number of arguments. Here are the key points about using params in C#:

1. The params keyword must be followed by an array type parameter in the method declaration. The parameter type must be a single-dimensional array.
2. You can only use the params keyword once in a method declaration, and it must be the last parameter in the parameter list.
3. When calling a method with a params parameter, you have several options
   You can pass a comma-separated list of arguments of the type specified for the params parameter. For example:

void MyMethod(params int[] numbers)
{
    // Code implementation
}

// Calling the method with a comma-separated list of arguments
MyMethod(1, 2, 3, 4, 5);

You can pass an array of arguments of the specified type. For example

void MyMethod(params string[] names)
{
    // Code implementation
}

// Creating an array and passing it to the method
string[] nameArray = { "John", "Jane", "Alice" };
MyMethod(nameArray);

If you don’t pass any arguments, the length of the params list will be zero. For example:

void MyMethod(params object[] items)
{
    // Code implementation
}

// Calling the method with no arguments
MyMethod(); // The length of the 'items' array will be zero

It’s worth noting that the params keyword is a syntactic sugar in C#. It simplifies the syntax for passing variable-length argument lists to methods, but behind the scenes, it’s still treated as an array parameter.