C# - multiple parameters in method

In this short article, we would like to show how to pass multiple arguments to function in C#.

Quick solution:

void DoSomething(params String[] argumnets) // <--- multiple arguments by using: params String[]
{
    // some logic here ...

    // int count = arguments.Length;
    //
    // argumnets[0]
    // argumnets[1]
    // argumnets[2]
    // ...
}


// Using:

DoSomething();
DoSomething("arg 1");
DoSomething("arg 1", "arg 2");
DoSomething("arg 1", "arg 2", "arg N");

1. Documentation

Simple case:

ResultType MethodName(params ArgumentsType[] arguments)
{
    /* ... */
}

ResultType result = MethodName(
    paramVariable1,
    paramVariable2,
    // ...
    paramVariableN
);

Composed cases:

ResultType MethodName(
    ArgumentType1 argument1,
    ArgumentType2 argument2,
    // ...
    ArgumentTypeN argumentN,
    params ArgumentsType[] arguments
) {
    /* ... */
}

ResultType result = MethodName(
    variable1,      variable2,      variableN,       /* ... */
    paramVariable1, paramVariable2, paramVariableN   /* ... */
);

Practical example

In ths section you can see 2 example cases:

• multiple arguments function,
• normal arguments function extended with additional arguments.

using System;

public class Program
{
    public static void Main(String[] args)
	{
        DoSomething();
        DoSomething("arg 1", "arg 2");
        DoSomething("arg 1", "arg 2", "arg 3", "arg N");

        DoSomething(1, 2, 3);
		DoSomething(1, 2, 3, "arg 1", "arg 2");
		DoSomething(1, 2, 3, "arg 1", "arg 2", "arg 3", "arg N");
    }
	
	private static void DoSomething(params String[] arguments)
	{
		Console.WriteLine("Arguments count: " + arguments.Length);
	}
	
	private static void DoSomething(int a, int b, int c, params String[] arguments)
	{
		Console.Write("a=" + a + ", ");
		Console.Write("b=" + b + ", ");
		Console.Write("c=" + c + ", ");
		Console.WriteLine("Arguments count: " + arguments.Length);
	}
}

Output:

Arguments count: 0
Arguments count: 2
Arguments count: 4
a=1, b=2, c=3, Arguments count: 0
a=1, b=2, c=3, Arguments count: 2
a=1, b=2, c=3, Arguments count: 4

References

1. params (C# Reference) - Microsoft Docs