Add GetAttribute for enums

src/NzbDrone.Common/Extensions/EnumExtensions.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Linq;
+
+namespace NzbDrone.Common.Extensions
+{
+    public static class EnumExtensions
+    {
+        public static T GetAttribute<T>(this Enum value)
+            where T : Attribute
+        {
+            var enumType = value.GetType();
+            var name = Enum.GetName(enumType, value);
+
+            return name == null ? null : enumType.GetField(name)?.GetCustomAttributes(false).OfType<T>().SingleOrDefault();
+        }
+    }
+}