Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/EntityClient/NameValuePair.cs

@@ -0,0 +1,40 @@
+//------------------------------------------------------------------------------
+// <copyright file="NameValuePair.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+
+// @owner  [....]
+// @backupOwner  [....]
+//------------------------------------------------------------------------------
+
+namespace System.Data.EntityClient
+{
+    /// <summary>
+    /// Copied from System.Data.dll
+    /// </summary>
+    sealed internal class NameValuePair {
+        readonly private string _name;
+        readonly private string _value;
+        readonly private int _length;
+        private NameValuePair _next;
+
+        internal NameValuePair(string name, string value, int length) {
+            System.Diagnostics.Debug.Assert(!string.IsNullOrEmpty(name), "empty keyname");
+            _name = name;
+            _value = value;
+            _length = length;
+        }
+
+        internal NameValuePair Next {
+            get {
+                return _next;
+            }
+            set {
+                if ((null != _next) || (null == value)) {
+                    throw EntityUtil.InternalError(EntityUtil.InternalErrorCode.NameValuePairNext);
+                }
+                _next = value;
+            }
+        } 
+    }
+}