Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Data.Entity/System/Data/Objects/DataClasses/EdmSchemaAttribute.cs

@@ -0,0 +1,40 @@
+//---------------------------------------------------------------------
+// <copyright file="EdmSchemaAttribute.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner       [....]
+// @backupOwner [....]
+//---------------------------------------------------------------------
+
+using System;
+namespace System.Data.Objects.DataClasses
+{
+    /// <summary>
+    /// Attribute for static types
+    /// </summary>
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1019:DefineAccessorsForAttributeArguments"), System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Edm")]
+    [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class, AllowMultiple = true)]
+    public sealed class EdmSchemaAttribute : System.Attribute
+    {
+        /// <summary>
+        /// Constructor for EdmSchemaAttribute
+        /// </summary>
+        public EdmSchemaAttribute()
+        {
+        }
+        /// <summary>
+        /// Setting this parameter to a unique value for each model file in a Visual Basic
+        /// assembly will prevent the following error: 
+        /// "'System.Data.Objects.DataClasses.EdmSchemaAttribute' cannot be specified more than once in this project, even with identical parameter values."
+        /// </summary>
+        public EdmSchemaAttribute(string assemblyGuid)
+        {
+            if (null == assemblyGuid)
+            {
+                throw new System.ArgumentNullException("assemblyGuid");
+            }
+        }
+    }
+}
+