Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Hosting/ApplicationHost.cs

@@ -0,0 +1,61 @@
+//------------------------------------------------------------------------------
+// <copyright file="ApplicationHost.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.Hosting {
+
+    using System;
+    using System.IO;
+    using System.Collections;
+    using System.Globalization;
+    using System.Runtime.InteropServices;
+    using System.Runtime.Remoting;
+    using System.Web;
+    using System.Web.Configuration;
+    using System.Web.Util;
+    using System.Security.Permissions;
+
+
+    /// <devdoc>
+    ///    <para>[To be supplied.]</para>
+    /// </devdoc>
+    public sealed class ApplicationHost {
+
+        private ApplicationHost() {
+        }
+
+        /*
+         * Creates new app domain for hosting of ASP.NET apps with a
+         * user defined 'host' object in it.  The host is needed to make
+         * cross-domain calls to process requests in the host's app domain
+         */
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        [SecurityPermission(SecurityAction.Demand, Unrestricted=true)]
+        public static Object CreateApplicationHost(Type hostType, String virtualDir, String physicalDir) {
+#if !FEATURE_PAL // FEATURE_PAL does not require PlatformID.Win32NT
+            if (Environment.OSVersion.Platform != PlatformID.Win32NT)
+                throw new PlatformNotSupportedException(SR.GetString(SR.RequiresNT));
+#else // !FEATURE_PAL
+            // FEATURE_PAL
+#endif // !FEATURE_PAL
+
+            if (!StringUtil.StringEndsWith(physicalDir, Path.DirectorySeparatorChar))
+                physicalDir = physicalDir + Path.DirectorySeparatorChar;
+
+            ApplicationManager appManager = ApplicationManager.GetApplicationManager();
+
+            String appId = StringUtil.GetNonRandomizedHashCode(String.Concat(virtualDir, physicalDir)).ToString("x");
+
+
+            ObjectHandle h = appManager.CreateInstanceInNewWorkerAppDomain(
+                                hostType, appId, VirtualPath.CreateNonRelative(virtualDir), physicalDir);
+
+            return h.Unwrap();
+        }
+    }
+}