From 2b49354fd6b91c72a9599b2a2f78b2e72481b71a Mon Sep 17 00:00:00 2001
From: Chris Cameron <chris.cameron@wedoresi.com>
Date: Thu, 12 Apr 2018 13:34:32 -0400
Subject: [PATCH 1/2] feat: Reflection util for subscribing to an EventInfo

---
 ICD.Common.Utils/ReflectionUtils.cs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/ICD.Common.Utils/ReflectionUtils.cs b/ICD.Common.Utils/ReflectionUtils.cs
index 1260bb6..d21b9c9 100644
--- a/ICD.Common.Utils/ReflectionUtils.cs
+++ b/ICD.Common.Utils/ReflectionUtils.cs
@@ -414,5 +414,26 @@ namespace ICD.Common.Utils
 				throw new InvalidCastException(message, e);
 			}
 		}
+
+		/// <summary>
+		/// Subscribes to the event on the given instance using the handler and callback method.
+		/// </summary>
+		/// <param name="instance"></param>
+		/// <param name="eventInfo"></param>
+		/// <param name="handler"></param>
+		/// <param name="callback"></param>
+		/// <returns></returns>
+		public static Delegate SubscribeEvent(object instance, EventInfo eventInfo, object handler, MethodInfo callback)
+		{
+			if (eventInfo == null)
+				throw new ArgumentNullException("eventInfo");
+
+			if (callback == null)
+				throw new ArgumentNullException("callback");
+
+			Delegate output = CreateDelegate(eventInfo.EventHandlerType, handler, callback);
+			eventInfo.AddEventHandler(instance, output);
+			return output;
+		}
 	}
 }

From bc1ecf8b8e278e5ac9b8e443e99e668d402b5539 Mon Sep 17 00:00:00 2001
From: Chris Cameron <chris.cameron@wedoresi.com>
Date: Thu, 12 Apr 2018 14:16:53 -0400
Subject: [PATCH 2/2] feat: Reflection method for unsubscribing from an event.

---
 ICD.Common.Utils/ReflectionUtils.cs | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/ICD.Common.Utils/ReflectionUtils.cs b/ICD.Common.Utils/ReflectionUtils.cs
index d21b9c9..534ca34 100644
--- a/ICD.Common.Utils/ReflectionUtils.cs
+++ b/ICD.Common.Utils/ReflectionUtils.cs
@@ -418,10 +418,10 @@ namespace ICD.Common.Utils
 		/// <summary>
 		/// Subscribes to the event on the given instance using the handler and callback method.
 		/// </summary>
-		/// <param name="instance"></param>
-		/// <param name="eventInfo"></param>
-		/// <param name="handler"></param>
-		/// <param name="callback"></param>
+		/// <param name="instance">The instance with the event. Null for static types.</param>
+		/// <param name="eventInfo">The EventInfo for the event.</param>
+		/// <param name="handler">The instance with the callback MethodInfo. Null for static types.</param>
+		/// <param name="callback">The MethodInfo for the callback method.</param>
 		/// <returns></returns>
 		public static Delegate SubscribeEvent(object instance, EventInfo eventInfo, object handler, MethodInfo callback)
 		{
@@ -435,5 +435,22 @@ namespace ICD.Common.Utils
 			eventInfo.AddEventHandler(instance, output);
 			return output;
 		}
+
+		/// <summary>
+		/// Unsubscribes from the event on the given instance.
+		/// </summary>
+		/// <param name="instance">The instance with the event. Null for static types.</param>
+		/// <param name="eventInfo">The EventInfo for the event.</param>
+		/// <param name="callback">The Delegate to be removed from the event.</param>
+		public static void UnsubscribeEvent(object instance, EventInfo eventInfo, Delegate callback)
+		{
+			if (eventInfo == null)
+				throw new ArgumentNullException("eventInfo");
+
+			if (callback == null)
+				throw new ArgumentNullException("callback");
+
+			eventInfo.RemoveEventHandler(instance, callback);
+		}
 	}
 }