From 36886dedd61b33e68eb77a1065636de14ebcbbcb Mon Sep 17 00:00:00 2001
From: Marcos Vinicius Maia <juninhowblu@gmail.com>
Date: Fri, 29 Dec 2017 17:08:35 -0200
Subject: [PATCH 1/3] Added error fallback methods

---
 Chain/OngoingChaining.cs | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/Chain/OngoingChaining.cs b/Chain/OngoingChaining.cs
index 2c13b79..4c7f531 100644
--- a/Chain/OngoingChaining.cs
+++ b/Chain/OngoingChaining.cs
@@ -4,16 +4,44 @@ namespace Chain
 {
     public class OngoingChaining<T> where T : class
     {
-        private  T _currentResult;
+        private T _currentResult;
+        private Action<Exception> _errorFallback;
+        private Action<Exception> _globalErrorFallback;
 
         internal OngoingChaining(T currentResult)
         {
             _currentResult = currentResult;
         }
 
+        public OngoingChaining<T> WithErrorFallback(Action<Exception> onError)
+        {
+            _errorFallback = onError;
+            return this;
+        }
+
+        public OngoingChaining<T> WithGlobalErrorFallback(Action<Exception> onError)
+        {
+            _globalErrorFallback = onError;
+            return this;
+        }
+
         public OngoingChaining<TNext> Then<TNext>(Func<T, TNext> nextFunction) where TNext : class
         {
-            return _currentResult != null ? new OngoingChaining<TNext>(nextFunction(_currentResult)) : new OngoingChaining<TNext>(null);
+            try
+            {
+                var result = _currentResult != null
+                    ? new OngoingChaining<TNext>(nextFunction(_currentResult))
+                    : new OngoingChaining<TNext>(null);
+
+                _errorFallback = null;
+                return result;
+            }
+            catch (Exception ex)
+            {
+                _errorFallback?.Invoke(ex);
+                _globalErrorFallback?.Invoke(ex);
+                return null;
+            }
         }
 
         public OngoingChaining<T> OrElse(T fallback)

From 2cea7dbd7b2d22129ffcb845820b9c43b10b1b92 Mon Sep 17 00:00:00 2001
From: Marcos Vinicius Maia <juninhowblu@gmail.com>
Date: Fri, 29 Dec 2017 17:08:41 -0200
Subject: [PATCH 2/3] Updated gitignore

---
 .gitignore | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.gitignore b/.gitignore
index 070b636..f9e37fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -107,3 +107,5 @@ Generated_Code #added for RIA/Silverlight projects
 _UpgradeReport_Files/
 Backup*/
 UpgradeLog*.XML
+
+\.idea/

From 6acd6e0845146af6e7776b58aa91951ac66dd6e7 Mon Sep 17 00:00:00 2001
From: Marcos Vinicius Maia <juninhowblu@gmail.com>
Date: Fri, 5 Jan 2018 13:57:35 -0200
Subject: [PATCH 3/3] Fixed OrElse not working at the initial function

---
 Chain/Chain.cs | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/Chain/Chain.cs b/Chain/Chain.cs
index aef0aeb..f5c7e76 100644
--- a/Chain/Chain.cs
+++ b/Chain/Chain.cs
@@ -1,5 +1,4 @@
-
-using System;
+using System;
 
 namespace Chain
 {
@@ -7,7 +6,14 @@ public abstract class Chain
     {
         public static OngoingChaining<T> Do<T>(Func<T> startFunction) where T : class
         {
-            return new OngoingChaining<T>(startFunction());
+            try
+            {
+                return new OngoingChaining<T>(startFunction());
+            }
+            catch
+            {
+                return new OngoingChaining<T>(null);
+            }
         }
 
         public static OngoingChaining<T> Do<T>(T startObject) where T : class
@@ -15,4 +21,4 @@ public static OngoingChaining<T> Do<T>(T startObject) where T : class
             return new OngoingChaining<T>(startObject);
         }
     }
-}
+}
\ No newline at end of file