1 files changed, 115 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/Reflection/EventInfo.cs b/src/mscorlib/shared/System/Reflection/EventInfo.cs
new file mode 100644
index 0000000000..ccd9acf648
--- /dev/null
+++ b/src/mscorlib/shared/System/Reflection/EventInfo.cs
@@ -0,0 +1,115 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics;
+
+#if FEATURE_COMINTEROP
+using EventRegistrationToken = System.Runtime.InteropServices.WindowsRuntime.EventRegistrationToken;
+#endif //#if FEATURE_COMINTEROP
+
+namespace System.Reflection
+{
+    public abstract class EventInfo : MemberInfo
+    {
+        protected EventInfo() { }
+
+        public override MemberTypes MemberType => MemberTypes.Event;
+
+        public abstract EventAttributes Attributes { get; }
+        public bool IsSpecialName => (Attributes & EventAttributes.SpecialName) != 0;
+
+        public MethodInfo[] GetOtherMethods() => GetOtherMethods(nonPublic: false);
+        public virtual MethodInfo[] GetOtherMethods(bool nonPublic) { throw NotImplemented.ByDesign; }
+
+        public virtual MethodInfo AddMethod => GetAddMethod(nonPublic: true);
+        public virtual MethodInfo RemoveMethod => GetRemoveMethod(nonPublic: true);
+        public virtual MethodInfo RaiseMethod => GetRaiseMethod(nonPublic: true);
+
+        public MethodInfo GetAddMethod() => GetAddMethod(nonPublic: false);
+        public MethodInfo GetRemoveMethod() => GetRemoveMethod(nonPublic: false);
+        public MethodInfo GetRaiseMethod() => GetRaiseMethod(nonPublic: false);
+
+        public abstract MethodInfo GetAddMethod(bool nonPublic);
+        public abstract MethodInfo GetRemoveMethod(bool nonPublic);
+        public abstract MethodInfo GetRaiseMethod(bool nonPublic);
+
+        public virtual bool IsMulticast
+        {
+            get
+            {
+                Type cl = EventHandlerType;
+                Type mc = typeof(MulticastDelegate);
+                return mc.IsAssignableFrom(cl);
+            }
+        }
+
+        public virtual Type EventHandlerType
+        {
+            get
+            {
+                MethodInfo m = GetAddMethod(true);
+                ParameterInfo[] p = m.GetParametersNoCopy();
+                Type del = typeof(Delegate);
+                for (int i = 0; i < p.Length; i++)
+                {
+                    Type c = p[i].ParameterType;
+                    if (c.IsSubclassOf(del))
+                        return c;
+                }
+                return null;
+            }
+        }
+
+        [DebuggerHidden]
+        [DebuggerStepThrough]
+        public virtual void AddEventHandler(object target, Delegate handler)
+        {
+            MethodInfo addMethod = GetAddMethod(nonPublic: false);
+
+            if (addMethod == null)
+                throw new InvalidOperationException(SR.InvalidOperation_NoPublicAddMethod);
+
+#if FEATURE_COMINTEROP
+            if (addMethod.ReturnType == typeof(EventRegistrationToken))
+                throw new InvalidOperationException(SR.InvalidOperation_NotSupportedOnWinRTEvent);
+#endif //#if FEATURE_COMINTEROP
+
+            addMethod.Invoke(target, new object[] { handler });
+        }
+
+        [DebuggerHidden]
+        [DebuggerStepThrough]
+        public virtual void RemoveEventHandler(object target, Delegate handler)
+        {
+            MethodInfo removeMethod = GetRemoveMethod(nonPublic: false);
+
+            if (removeMethod == null)
+                throw new InvalidOperationException(SR.InvalidOperation_NoPublicRemoveMethod);
+
+#if FEATURE_COMINTEROP
+            ParameterInfo[] parameters = removeMethod.GetParametersNoCopy();
+            if (parameters[0].ParameterType == typeof(EventRegistrationToken))
+                throw new InvalidOperationException(SR.InvalidOperation_NotSupportedOnWinRTEvent);
+#endif //#if FEATURE_COMINTEROP
+
+            removeMethod.Invoke(target, new object[] { handler });
+        }
+
+        public override bool Equals(object obj) => base.Equals(obj);
+        public override int GetHashCode() => base.GetHashCode();
+
+        public static bool operator ==(EventInfo left, EventInfo right)
+        {
+            if (object.ReferenceEquals(left, right))
+                return true;
+
+            if ((object)left == null || (object)right == null)
+                return false;
+
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(EventInfo left, EventInfo right) => !(left == right);
+    }
+}