From d4c437f9d3fee0eaf5c471ef2a851ba9988615ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ertug=CC=86rul=20O=CC=88zcan?=
 <ertugrul.ozcan@demirorenteknoloji.com>
Date: Fri, 21 Jun 2019 17:34:18 +0300
Subject: [PATCH 1/2] Extract method refactoring for fractional seconds
 removing

---
 src/Utils/DateTimeUtils.cs | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/src/Utils/DateTimeUtils.cs b/src/Utils/DateTimeUtils.cs
index 20a2cfd..57b318f 100644
--- a/src/Utils/DateTimeUtils.cs
+++ b/src/Utils/DateTimeUtils.cs
@@ -234,18 +234,8 @@ private static bool TryParseDateRfc3339(string dateTimeString, out DateTimeOffse
             const string Rfc3339LocalDateTimeFormat = "yyyy-MM-ddTHH:mm:sszzz";
             const string Rfc3339UTCDateTimeFormat = "yyyy-MM-ddTHH:mm:ssZ";
 
-            dateTimeString = dateTimeString.Trim();
-
-            if (dateTimeString[19] == '.')
-            {
-                // remove any fractional seconds, we choose to ignore them
-                int i = 20;
-                while (dateTimeString.Length > i && char.IsDigit(dateTimeString[i]))
-                {
-                    ++i;
-                }
-                dateTimeString = dateTimeString.Substring(0, 19) + dateTimeString.Substring(i);
-            }
+            // remove any fractional seconds, we choose to ignore them
+            dateTimeString = RemoveFractionalSeconds(dateTimeString);
 
             DateTimeOffset localTime;
             if (DateTimeOffset.TryParseExact(dateTimeString, Rfc3339LocalDateTimeFormat,
@@ -255,6 +245,7 @@ private static bool TryParseDateRfc3339(string dateTimeString, out DateTimeOffse
                 result = localTime;
                 return true;
             }
+            
             DateTimeOffset utcTime;
             if (DateTimeOffset.TryParseExact(dateTimeString, Rfc3339UTCDateTimeFormat,
                 CultureInfo.InvariantCulture.DateTimeFormat,
@@ -263,7 +254,26 @@ private static bool TryParseDateRfc3339(string dateTimeString, out DateTimeOffse
                 result = utcTime;
                 return true;
             }
+            
             return false;
         }
+        
+        private static string RemoveFractionalSeconds(string dateTimeString)
+        {
+            dateTimeString = dateTimeString.Trim();
+
+            if (dateTimeString[19] == '.')
+            {
+                int i = 20;
+                while (dateTimeString.Length > i && char.IsDigit(dateTimeString[i]))
+                {
+                    ++i;
+                }
+                
+                dateTimeString = dateTimeString.Substring(0, 19) + dateTimeString.Substring(i);
+            }
+
+            return dateTimeString;
+        }
     }
 }

From 80cfbddbd23efc973e85147c1cb31e0be60ee417 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ertug=CC=86rul=20O=CC=88zcan?=
 <ertugrul.ozcan@demirorenteknoloji.com>
Date: Fri, 21 Jun 2019 17:35:42 +0300
Subject: [PATCH 2/2] Check dateTimeString length on RemoveFractionalSeconds
 method

---
 src/Utils/DateTimeUtils.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Utils/DateTimeUtils.cs b/src/Utils/DateTimeUtils.cs
index 57b318f..008cbf4 100644
--- a/src/Utils/DateTimeUtils.cs
+++ b/src/Utils/DateTimeUtils.cs
@@ -257,11 +257,14 @@ private static bool TryParseDateRfc3339(string dateTimeString, out DateTimeOffse
             
             return false;
         }
-        
+
         private static string RemoveFractionalSeconds(string dateTimeString)
         {
             dateTimeString = dateTimeString.Trim();
 
+            if (dateTimeString.Length < 20 || dateTimeString.IndexOf('.') < 0)
+                return dateTimeString;
+            
             if (dateTimeString[19] == '.')
             {
                 int i = 20;