How to display command-line arguments

Arguments provided to an executable on the command line are accessible in top-level statements or through an optional parameter to Main. The arguments are provided in the form of an array of strings. Each element of the array contains one argument. White-space between arguments is removed. For example, consider these command-line invocations of a fictitious executable:

Input on command line	Array of strings passed to Main
executable.exe a b c	"a" "b" "c"
executable.exe one two	"one" "two"
executable.exe "one two" three	"one two" "three"

Примітка

When you are running an application in Visual Studio, you can specify command-line arguments in the Debug Page, Project Designer.

Example

This example displays the command-line arguments passed to a command-line application. The output shown is for the first entry in the table above.

C#

// The Length property provides the number of array elements.
Console.WriteLine($"parameter count = {args.Length}");

for (int i = 0; i < args.Length; i++)
{
    Console.WriteLine($"Arg[{i}] = [{args[i]}]");
}

/* Output (assumes 3 cmd line args):
    parameter count = 3
    Arg[0] = [a]
    Arg[1] = [b]
    Arg[2] = [c]
*/

See also

• System.CommandLine overview
• Tutorial: Get started with System.CommandLine