C# WPF帮助1.删除列表框中的前两项或2.阻止它在输出中显示批处理中的命令语法

<ListBox x:Name="myListBox">
    <ListBoxItem>Item 1</ListBoxItem>
    <ListBoxItem>Item 2</ListBoxItem>
    <ListBoxItem>Item 3</ListBoxItem>
    <ListBoxItem>Item 4</ListBoxItem>
</ListBox>

myListBox.Items.RemoveAt(0);
myListBox.Items.RemoveAt(0);

using System;
using System.Diagnostics;

class Program
{
    static void Main()
    {
        Process process = new Process();
        process.StartInfo.FileName = "cmd.exe";
        process.StartInfo.Arguments = "/C echo Hello World";
        process.StartInfo.RedirectStandardOutput = true;
        process.StartInfo.CreateNoWindow = true;
        process.StartInfo.UseShellExecute = false;

        process.Start();
        string output = process.StandardOutput.ReadToEnd();
        process.WaitForExit();

        Console.WriteLine(output);
    }
}