Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.IdentityModel/System/IdentityModel/Tokens/AuthenticationContext.cs

@@ -0,0 +1,53 @@
+//------------------------------------------------------------------------------
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------------------------
+
+using System;
+using System.Collections.ObjectModel;
+
+namespace System.IdentityModel.Tokens
+{
+    /// <summary>
+    /// This class is used to specify the context of an authentication event.
+    /// </summary>
+    public class AuthenticationContext
+    {
+        Collection<string> _authorities; 
+        string _contextClass;
+        string _contextDeclaration;
+        
+        /// <summary>
+        /// Creates an instance of AuthenticationContext.
+        /// </summary>
+        public AuthenticationContext()
+        {
+            _authorities = new Collection<string>();
+        }
+
+        /// <summary>
+        /// The collection of authorities for resolving an authentication event.
+        /// </summary>
+        public Collection<string> Authorities
+        {
+            get { return _authorities; }
+        }
+
+        /// <summary>
+        /// The context class for resolving an authentication event.
+        /// </summary>
+        public string ContextClass
+        {
+            get { return _contextClass; }
+            set { _contextClass = value; }
+        }
+
+        /// <summary>
+        /// The context declaration for resolving an authentication event.
+        /// </summary>
+        public string ContextDeclaration
+        {
+            get { return _contextDeclaration; }
+            set { _contextDeclaration = value; }
+        }
+    }
+}