Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/Cache/HeaderElement.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Security.Permissions;
+using System.Web;
+using System.Web.Caching;
+
+namespace System.Web.Caching {
+    // A header element holds the header name and value.
+    [Serializable]
+    public sealed class HeaderElement {
+        private  string                     _name;
+        private  string                     _value;
+
+        public   string                     Name    { get { return _name; } }
+        public   string                     Value   { get { return _value; } }
+
+        private HeaderElement() { } // hide default constructor
+
+        public HeaderElement(string name, string value) {
+            if (name == null)
+                throw new ArgumentNullException("name");
+            if (value == null)
+                throw new ArgumentNullException("value");
+
+            _name = name;
+            _value = value;
+        }
+    }
+}