C#中如何定義全域變數及在各表單中使用全域變數

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using System;using System.Collections.Generic;using System.Drawing;using System.Windows.Forms;using System.IO;namespace NewTest{public class PublicValue{public static string FileName;public static int[] aa;}/// <summary>/// Description of MainForm./// </summary>public partial class MainForm : Form{public MainForm(){//// The InitializeComponent() call is required for Windows Forms designer support.//InitializeComponent();//// TODO: Add constructor code after the InitializeComponent() call.//}void MainFormLoad(object sender, EventArgs e){this.Width=Screen.PrimaryScreen.WorkingArea.Width;this.Height =Screen.PrimaryScreen.WorkingArea.Height;this.Left =Screen.PrimaryScreen.WorkingArea.Left;this.Top =Screen.PrimaryScreen.WorkingArea.Top;}void Button1Click(object sender, EventArgs e){PublicValue.aa=new int[10];PublicValue.aa[0]=10;PublicValue.FileName="dfjlkjkldfsjl";}}}

以上定義的publicValue類，其中的變數可以在同一個命名空間中使用，包括在子表單或非子視窗中調用。

C#中如何定義全域變數及在各表單中使用全域變數