Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/entityframework/src/EntityFramework/Infrastructure/ExecutionStrategyKey.cs

@@ -0,0 +1,42 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+namespace System.Data.Entity.Infrastructure
+{
+    using System.Data.Entity.Utilities;
+
+    /// <summary>
+    ///     A key used for resolving <see cref="ExecutionStrategy"/>. It consists of the ADO.NET provider invariant name
+    ///     and the database server address as specified in the connection string.
+    /// </summary>
+    public class ExecutionStrategyKey
+    {
+        public ExecutionStrategyKey(string invariantProviderName, string dataSource)
+        {
+            Check.NotEmpty(invariantProviderName, "invariantProviderName");
+            Check.NotEmpty(dataSource, "dataSource");
+
+            InvariantProviderName = invariantProviderName;
+            DataSourceName = dataSource;
+        }
+
+        public string InvariantProviderName { get; private set; }
+        public string DataSourceName { get; private set; }
+
+        public override bool Equals(object obj)
+        {
+            var otherKey = obj as ExecutionStrategyKey;
+            if (ReferenceEquals(otherKey, null))
+            {
+                return false;
+            }
+
+            return InvariantProviderName == otherKey.InvariantProviderName
+                   && DataSourceName == otherKey.DataSourceName;
+        }
+
+        public override int GetHashCode()
+        {
+            return InvariantProviderName.GetHashCode() ^ DataSourceName.GetHashCode();
+        }
+    }
+}