Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/EventDescriptor.cs

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+//------------------------------------------------------------------------------
+// <copyright file="EventDescriptor.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+namespace System.ComponentModel {
+
+    using System;
+    using System.Diagnostics;
+    using System.Reflection;
+    using System.Security.Permissions;
+
+    /// <devdoc>
+    ///    <para>
+    ///       Provides a description
+    ///       of an event.
+    ///    </para>
+    /// </devdoc>
+    [HostProtection(SharedState = true)]
+    [System.Runtime.InteropServices.ComVisible(true)]
+    public abstract class EventDescriptor : MemberDescriptor {
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.ComponentModel.EventDescriptor'/> class with the
+        ///       specified name and attribute
+        ///       array.
+        ///    </para>
+        /// </devdoc>
+        protected EventDescriptor(string name, Attribute[] attrs)
+            : base(name, attrs) {
+        }
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.ComponentModel.EventDescriptor'/> class with the name and attributes in
+        ///       the specified <see cref='System.ComponentModel.MemberDescriptor'/>
+        ///       .
+        ///    </para>
+        /// </devdoc>
+        protected EventDescriptor(MemberDescriptor descr)
+            : base(descr) {
+        }
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.ComponentModel.EventDescriptor'/> class with
+        ///       the name in the specified <see cref='System.ComponentModel.MemberDescriptor'/> and the
+        ///       attributes in both the <see cref='System.ComponentModel.MemberDescriptor'/> and the <see cref='System.Attribute'/>
+        ///       array.
+        ///    </para>
+        /// </devdoc>
+        protected EventDescriptor(MemberDescriptor descr, Attribute[] attrs)
+            : base(descr, attrs) {
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       When overridden in a derived
+        ///       class,
+        ///       gets the type of the component this event is bound to.
+        ///    </para>
+        /// </devdoc>
+        public abstract Type ComponentType { get; }
+
+        /// <devdoc>
+        ///    <para>
+        ///       When overridden in a derived
+        ///       class, gets the type of delegate for the event.
+        ///    </para>
+        /// </devdoc>
+        public abstract Type EventType { get; }
+
+        /// <devdoc>
+        ///    <para>
+        ///       When overridden in a derived class, gets a value
+        ///       indicating whether the event delegate is a multicast
+        ///       delegate.
+        ///    </para>
+        /// </devdoc>
+        public abstract bool IsMulticast { get; }
+
+        /// <devdoc>
+        ///    <para>
+        ///       When overridden in
+        ///       a derived class,
+        ///       binds the event to the component.
+        ///    </para>
+        /// </devdoc>
+        public abstract void AddEventHandler(object component, Delegate value);
+
+        /// <devdoc>
+        ///    <para>
+        ///       When
+        ///       overridden
+        ///       in a derived class, unbinds the delegate from the
+        ///       component
+        ///       so that the delegate will no
+        ///       longer receive events from the component.
+        ///    </para>
+        /// </devdoc>
+        public abstract void RemoveEventHandler(object component, Delegate value);
+    }
+}