C#编程

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Form1.cs：源码内容

							using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Security.Permissions;
namespace DemandingPermissions
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;
		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
//			try
//			{
				FileIOPermission fileioperm = new
					FileIOPermission(FileIOPermissionAccess.AllAccess,@"c:");
				fileioperm.Demand();
//			}
//			catch
//			{
//				button1.Enabled = false;
//			}
		}
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}
		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(24, 24);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(200, 23);
			this.button1.TabIndex = 0;
			this.button1.Text = "Button Requires FileIOPermission ";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(272, 77);
			this.Controls.Add(this.button1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);
		}
		#endregion
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}
	}
}

						