using UnityEngine;
using System.Collections;
using System;
using UnityEngine.UI;
using System.Linq;

public class CmdTest : MonoBehaviour {

    public Text text1;
    public Text text2;

    // Use this for initialization
    void Start()
    {
        string CommandLine = Environment.CommandLine;
        string[] CommandLineArgs = Environment.GetCommandLineArgs();
        text1.text = "CommandLine : " + CommandLine;
        text2.text = CommandLineArgs.Aggregate<string, string>(
            "CommandLineArgs : ",
            (a, b) => a + " , " + b);
    }

}

编辑器下：

打包PC下（直接启动）：

打包PC下（命令行启动）：