Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/Compilation/ExpressionEditorAttribute.cs

@@ -0,0 +1,51 @@
+//------------------------------------------------------------------------------
+// <copyright file="ExpressionEditorAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Compilation {
+
+    using System.Security.Permissions;
+
+    [AttributeUsage(AttributeTargets.Class, AllowMultiple=false)]
+    public sealed class ExpressionEditorAttribute : Attribute {
+        private string _editorTypeName;
+
+
+        public ExpressionEditorAttribute(Type type) : this((type != null) ? type.AssemblyQualifiedName : null) {
+        }
+
+
+        public ExpressionEditorAttribute(string typeName) {
+            if (String.IsNullOrEmpty(typeName)) {
+                throw new ArgumentNullException("typeName");
+            }
+
+            _editorTypeName = typeName;
+        }
+
+
+        public string EditorTypeName {
+            get {
+                return _editorTypeName;
+            }
+        }
+
+
+        public override bool Equals(object obj) {
+            if (obj == this) {
+                return true;
+            }
+
+            ExpressionEditorAttribute other = obj as ExpressionEditorAttribute;
+
+            return ((other != null) && (other.EditorTypeName == EditorTypeName));
+        }
+
+
+        public override int GetHashCode() {
+            return EditorTypeName.GetHashCode();
+        }
+    }
+}