title: Access to the path 'xxxxxxxxx' is denied
body: <p>I'm facing this error every time I want to write file to folder.</p>
  
  <p>Here is my code: </p>
  
  <pre><code>protected void ListAttachments(List&lt;MessagePart&gt; msgParts)
      {
          bool attachmentsFound = false;
          StringBuilder b = new StringBuilder();
          b.Append("&lt;ol&gt;");
          foreach (MessagePart p in msgParts)
          {
              string contentType = p.Headers["Content-Type"];
              string contentDisposition = p.Headers["Content-Disposition"];
              Match m;
              if (contentDisposition != null)
              {
                  m = FilenameRegex.Match(contentDisposition);
                  if (m.Success)
                  {
                      attachmentsFound = true;
                      b.Append("&lt;li&gt;&lt;a href='Handler.ashx?fileName=" + m.Groups["filename"].Value + "'&gt;").Append(m.Groups["filename"].Value).Append("&lt;/a&gt;&lt;/li&gt;");
                      Response.AppendHeader("content-disposition", "attachment; filename=" + m.Groups["filename"].Value);
                      Response.ContentType = "application/octet-stream";
                      //Error Occurs
                      Response.TransmitFile(Server.MapPath(@"~/Files"));
                      Response.End();
                  }
              }
              else if (contentType != null)
              {
                  m = NameRegex.Match(contentType);
                  if (m.Success)
                  {
                      attachmentsFound = true;
                      b.Append("&lt;li&gt;&lt;a href='Handler.ashx?fileName="+m.Groups["filename"].Value+"'&gt;").Append(m.Groups["filename"].Value).Append("&lt;/a&gt;&lt;/li&gt;");
                  }
              }
          }
          b.Append("&lt;/ol&gt;");
          if (attachmentsFound)
              AttachmentsLiteral.Text = b.ToString();
          else
              AttachementsRow.Visible = false;
      }
  </code></pre>
  
  <p>Here error occurs like <code>Access to the path 'F:\Gmail\Files' is denied</code>.</p>
  
  <p>This is error details:</p>
  
  <pre><code>Server Error in '/Gmail' Application.
  
  Access to the path 'F:\Gmail\Files' is denied.
  
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 
  
  Exception Details: System.UnauthorizedAccessException: Access to the path 'F:\Gmail\Files' is denied. 
  
  ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via &lt;identity impersonate="true"/&gt;, the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user. 
  
  To grant ASP.NET access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access.
  
  Source Error: 
  
  
  Line 160:                    Response.AppendHeader("content-disposition", "attachment; filename=" + m.Groups["filename"].Value);
  Line 161:                    Response.ContentType = "application/octet-stream";
  Line 162:                    Response.TransmitFile(Server.MapPath(@"~/Files"));
  Line 163:                    Response.End();
  Line 164:                }
  
  Source File: f:\Gmail\DisplayPop3Email.aspx.cs    Line: 162 
  
  Stack Trace: 
  
  
  [UnauthorizedAccessException: Access to the path 'F:\Gmail\Files' is denied.]
     System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) +7712175
     System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) +1162
     System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share) +66
     System.Web.HttpResponse.TransmitFile(String filename, Int64 offset, Int64 length) +134
     System.Web.HttpResponse.TransmitFile(String filename) +12
     DisplayPop3Email.ListAttachments(List`1 msgParts) in f:\Gmail\DisplayPop3Email.aspx.cs:162
     DisplayPop3Email.Page_Load(Object sender, EventArgs e) in f:\Gmail\DisplayPop3Email.aspx.cs:90
     System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
     System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
     System.Web.UI.Control.OnLoad(EventArgs e) +99
     System.Web.UI.Control.LoadRecursive() +50
     System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
  </code></pre>
  
  <p>Please tell me how I can fix it up....</p>