Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Merge/AssessmentSectionMergeDataProviderDialog.cs
===================================================================
diff -u -r469c1810a2cc836791b78d185c7c1b0d414ec472 -r44021b29f3cdb11c11b22ca2b45e637b7ef20253
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Merge/AssessmentSectionMergeDataProviderDialog.cs	(.../AssessmentSectionMergeDataProviderDialog.cs)	(revision 469c1810a2cc836791b78d185c7c1b0d414ec472)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Merge/AssessmentSectionMergeDataProviderDialog.cs	(.../AssessmentSectionMergeDataProviderDialog.cs)	(revision 44021b29f3cdb11c11b22ca2b45e637b7ef20253)
@@ -42,9 +42,6 @@
     {
         private FailureMechanismMergeDataRow[] failureMechanismMergeDataRows;
         private bool assessmentSectionComboBoxUpdating;
-        private bool isDataSelected;
-        private AssessmentSection selectedAssessmentSection;
-        private IEnumerable<IFailureMechanism> selectedFailureMechanisms;
 
         /// <summary>
         /// Creates a new instance of the <see cref="AssessmentSectionMergeDataProviderDialog"/>.
@@ -68,10 +65,12 @@
             }
 
             SetComboBoxData(assessmentSections);
-            ShowDialog();
 
-            return isDataSelected
-                       ? new AssessmentSectionMergeData(selectedAssessmentSection, selectedFailureMechanisms)
+            return ShowDialog() == DialogResult.OK
+                       ? new AssessmentSectionMergeData((AssessmentSection) assessmentSectionComboBox.SelectedItem,
+                                                        failureMechanismMergeDataRows.Where(row => row.IsSelected)
+                                                                                     .Select(row => row.FailureMechanism)
+                                                                                     .ToArray())
                        : null;
         }
 
@@ -84,7 +83,6 @@
 
             base.Dispose(disposing);
 
-            importButton.Click -= OnImportButtonClick;
             assessmentSectionComboBox.SelectedIndexChanged -= AssessmentSectionComboBox_OnSelectedIndexChanged;
         }
 
@@ -117,6 +115,20 @@
             toolTip.SetToolTip(infoIcon, Resources.AssessmentSectionMergeDataProviderDialog_InfoToolTip);
         }
 
+        #region Event Handling
+
+        private void AssessmentSectionComboBox_OnSelectedIndexChanged(object sender, EventArgs eventArgs)
+        {
+            if (assessmentSectionComboBoxUpdating || assessmentSectionComboBox.SelectedIndex == -1)
+            {
+                return;
+            }
+
+            SetDataGridViewData((AssessmentSection) assessmentSectionComboBox.SelectedItem);
+        }
+
+        #endregion
+
         #region Data Setters
 
         private void SetComboBoxData(IEnumerable<AssessmentSection> assessmentSections)
@@ -162,30 +174,5 @@
         }
 
         #endregion
-
-        #region Event Handling
-
-        private void AssessmentSectionComboBox_OnSelectedIndexChanged(object sender, EventArgs eventArgs)
-        {
-            if (assessmentSectionComboBoxUpdating || assessmentSectionComboBox.SelectedIndex == -1)
-            {
-                return;
-            }
-
-            SetDataGridViewData((AssessmentSection) assessmentSectionComboBox.SelectedItem);
-        }
-
-        private void OnImportButtonClick(object sender, EventArgs eventArgs)
-        {
-            selectedAssessmentSection = (AssessmentSection) assessmentSectionComboBox.SelectedItem;
-            selectedFailureMechanisms = failureMechanismMergeDataRows?.Where(row => row.IsSelected)
-                                                                     .Select(row => row.FailureMechanism)
-                                                                     .ToArray();
-
-            isDataSelected = true;
-            Close();
-        }
-
-        #endregion
     }
 }
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