Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

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

@@ -0,0 +1,30 @@
+// 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.Common;
+
+    /// <summary>
+    ///     Implementations of this interface are used to create DbConnection objects for
+    ///     a type of database server based on a given database name.
+    ///     An Instance is set on the <see cref="Database" /> class to
+    ///     cause all DbContexts created with no connection information or just a database
+    ///     name or connection string to use a certain type of database server by default.
+    ///     Two implementations of this interface are provided: <see cref="SqlConnectionFactory" />
+    ///     is used to create connections to Microsoft SQL Server, including EXPRESS editions.
+    ///     <see cref="SqlCeConnectionFactory" /> is used to create connections to Microsoft SQL
+    ///     Server Compact Editions.
+    ///     Other implementations for other database servers can be added as needed.
+    ///     Note that implementations should be thread safe or immutable since they may
+    ///     be accessed by multiple threads at the same time.
+    /// </summary>
+    public interface IDbConnectionFactory
+    {
+        /// <summary>
+        ///     Creates a connection based on the given database name or connection string.
+        /// </summary>
+        /// <param name="nameOrConnectionString"> The database name or connection string. </param>
+        /// <returns> An initialized DbConnection. </returns>
+        DbConnection CreateConnection(string nameOrConnectionString);
+    }
+}