.NET Framework Class Library
HostingEnvironment Class

Provides application-management functions and application services to a managed application within its application domain. This class cannot be inherited.

Namespace:  System.Web.Hosting
Assembly:  System.Web (in System.Web.dll)
Syntax
Visual Basic (Declaration) 
<AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level := AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class HostingEnvironment _
    Inherits MarshalByRefObject
Visual Basic (Usage) 
Dim instance As HostingEnvironment
C# 
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class HostingEnvironment : MarshalByRefObject
Visual C++ 
[AspNetHostingPermissionAttribute(SecurityAction::LinkDemand, Level = AspNetHostingPermissionLevel::Minimal)]
public ref class HostingEnvironment sealed : public MarshalByRefObject
JScript 
public final class HostingEnvironment extends MarshalByRefObject
Remarks

Each managed application domain contains a static instance of the HostingEnvironment class, which provides access to application-management functions and application services.

Examples

The following code example is a Web page that displays the application information available from the HostingEnvironment object.

Visual Basic 
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Hosting" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
  Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    appID.Text = HostingEnvironment.ApplicationID
    appPPath.Text = HostingEnvironment.ApplicationPhysicalPath
    appVPath.Text = HostingEnvironment.ApplicationVirtualPath
    siteName.Text = HostingEnvironment.SiteName
  End Sub

</script>

<html >
<head id="Head1" runat="server">
  <title>Hosting Environment Sample</title>
</head>
<body>
  <form id="form1" runat="server">
    <div>
      <table>
        <tr>
          <td colspan="2">
            <b>HostingEnvironment Properties</b></td>
        </tr>
        <tr>
          <td>
            Application ID:
          </td>
          <td>
            <asp:Label ID="appID" runat="server" />
          </td>
        </tr>
        <tr>
          <td>
            Application Physical Path:
          </td>
          <td>
            <asp:Label ID="appPPath" runat="server" />
          </td>
        </tr>
        <tr>
          <td>
            Application Virtual Path:
          </td>
          <td>
            <asp:Label ID="appVPath" runat="server" />
          </td>
        </tr>
        <tr>
          <td>
            Site Name:
          </td>
          <td>
            <asp:Label ID="siteName" runat="server" />
          </td>
        </tr>
      </table>
    </div>
  </form>
</body>
</html>
C# 
<%@ Page Language="C#" %>

<%@ Import Namespace="System.Web.Hosting" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
  protected void Page_Load(object sender, EventArgs e)
  {
    appID.Text = HostingEnvironment.ApplicationID;
    appPPath.Text = HostingEnvironment.ApplicationPhysicalPath;
    appVPath.Text = HostingEnvironment.ApplicationVirtualPath;
    siteName.Text = HostingEnvironment.SiteName;
  }
</script>

<html >
<head runat="server">
  <title>Hosting Environment Sample</title>
</head>
<body>
  <form id="form1" runat="server">
    <div>
      <table>
        <tr>
          <td colspan="2">
            <b>HostingEnvironment Properties</b></td>
        </tr>
        <tr>
          <td>
            Application ID:
          </td>
          <td>
            <asp:Label ID="appID" runat="server" />
          </td>
        </tr>
        <tr>
          <td>
            Application Physical Path:
          </td>
          <td>
            <asp:Label ID="appPPath" runat="server" />
          </td>
        </tr>
        <tr>
          <td>
            Application Virtual Path:
          </td>
          <td>
            <asp:Label ID="appVPath" runat="server" />
          </td>
        </tr>
        <tr>
          <td>
            Site Name:
          </td>
          <td>
            <asp:Label ID="siteName" runat="server" />
          </td>
        </tr>
      </table>
    </div>
  </form>
</body>
</html>
.NET Framework Security
Inheritance Hierarchy
System..::.Object
  System..::.MarshalByRefObject
    System.Web.Hosting..::.HostingEnvironment
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0
See Also

Reference

HostingEnvironment Members
System.Web.Hosting Namespace
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