Position class Equals method override

src/PriceListTools/AbstractTool.cs

@@ -135,6 +135,7 @@ namespace RehauSku.PriceListTools
         protected int? GetPositionRow(Range range, string sku, string group)
         {
             Range found = range.Find(sku);
+            string foundGroupValue;
 
             if (found == null)
             {
@@ -143,13 +144,16 @@ namespace RehauSku.PriceListTools
 
             int firstFoundRow = found.Row;
 
+            if (string.IsNullOrEmpty(group))
+            {
+                return found.Row;
+            }
+
             while (true)
             {
-                Range groupCell = TargetFile.Sheet.Cells[found.Row, TargetFile.GroupCell.Column];
+                foundGroupValue = TargetFile.Sheet.Cells[found.Row, TargetFile.GroupCell.Column].Value2.ToString();
 
-                if (string.IsNullOrEmpty(group) || 
+                if (group.Equals(foundGroupValue))
-                    string.IsNullOrEmpty(groupCell.Value2.ToString()) || 
-                    group.Equals(groupCell.Value2.ToString()))
                 {
                     return found.Row;
                 }

src/PriceListTools/Position.cs

@@ -1,4 +1,6 @@
-namespace RehauSku.PriceListTools
+using System.Linq;
+
+namespace RehauSku.PriceListTools
 {
     public class Position 
     {
@@ -12,5 +14,29 @@
             Sku = sku;
             Name = name;
         }
+
+        public override bool Equals(object obj)
+        {
+            if (obj as Position == null)
+                return false;
+
+            Position other = obj as Position;
+
+            return Group == other.Group &&
+                Sku == other.Sku &&
+                Name == other.Name;
+        }
+
+        public override int GetHashCode()
+        {
+            string[] properties = new[]
+            {
+                Group,
+                Sku,
+                Name
+            };
+
+            return properties.Where(p => p != null).Sum(p => p.GetHashCode());
+        }
     }
 }