From ce396ccef851fdc2023068706ce97d5536aed42a Mon Sep 17 00:00:00 2001
From: Dirk Lemstra <dirk@git.imagemagick.org>
Date: Sun, 14 May 2017 10:34:50 +0200
Subject: [PATCH] Remove resolution value from profile before setting it if it
 does not have the correct data type. (Fixes #215)

---
 .../MetaData/Profiles/Exif/ExifProfile.cs           | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/ImageSharp/MetaData/Profiles/Exif/ExifProfile.cs b/src/ImageSharp/MetaData/Profiles/Exif/ExifProfile.cs
index b270caf5d..1217fc0a9 100644
--- a/src/ImageSharp/MetaData/Profiles/Exif/ExifProfile.cs
+++ b/src/ImageSharp/MetaData/Profiles/Exif/ExifProfile.cs
@@ -238,11 +238,18 @@ namespace ImageSharp
         private void SyncResolution(ExifTag tag, double resolution)
         {
             ExifValue value = this.GetValue(tag);
-            if (value != null)
+            if (value == null)
             {
-              Rational newResolution = new Rational(resolution, false);
-              this.SetValue(tag, newResolution);
+                return;
             }
+
+            if (value.IsArray || value.DataType != ExifDataType.Rational)
+            {
+                this.RemoveValue(value.Tag);
+            }
+
+            Rational newResolution = new Rational(resolution, false);
+            this.SetValue(tag, newResolution);
         }
 
         private void InitializeValues()