Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.IdentityModel/System/IdentityModel/Metadata/MetadataBase.cs

@@ -0,0 +1,24 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+using System.IdentityModel.Tokens;
+
+namespace System.IdentityModel.Metadata
+{
+    /// <summary>
+    /// Defines the Saml metadata base class.
+    /// </summary>
+    public abstract class MetadataBase
+    {
+        SigningCredentials _signingCredentials;
+
+        /// <summary>
+        /// Gets or sets the <see cref="SigningCredentials"/>.
+        /// </summary>
+        public SigningCredentials SigningCredentials
+        {
+            get { return _signingCredentials; }
+            set { _signingCredentials = value; }
+        }
+    }
+}