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Static application variables

File: Global.asax <%@ Application Language="C#" ClassName="Global" %> <%@ Import Namespace="System.IO" %> <%@ Import Namespace="System.Collections.Generic" %> <script runat="server">     private static string[] fileList;     public static string[] FileList     {         get         {             if (fileList == null)             {                 fileList = Directory.GetFiles(HttpContext.Current.Request.PhysicalApplicationPath);             }             return fileList;         }     }     private static Dictionary<string, string> metadata = new Dictionary<string, string>();     public void AddMetadata(string key, string value)     {         lock (metadata)         {             metadata[key] = value;         }     }     public string GetMetadata(string key)     {         lock (metadata)         {             return metadata[key];         }     } </script> File: Default.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="StaticApplicationVariables" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">     <title>Untitled Page</title> </head> <body>     <form id="form1" runat="server">     <div>         <asp:Label ID="lblInfo" runat="server"></asp:Label>          </div>     </form> </body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Text; using ASP; public partial class StaticApplicationVariables : System.Web.UI.Page {     protected void Page_Load(object sender, EventArgs e)     {     StringBuilder builder = new StringBuilder();     foreach (string file in Global.FileList)     {       builder.Append(file + "<br />");     }     lblInfo.Text = builder.ToString();     } }