diff --git a/WindowsFormsCore/Domain/NumberRow.cs b/WindowsFormsCore/Domain/NumberRow.cs
new file mode 100644
index 0000000..356baf0
--- /dev/null
+++ b/WindowsFormsCore/Domain/NumberRow.cs
@@ -0,0 +1,48 @@
+using System;
+
+namespace WindowsFormsCore.Domain
+{
+    public class NumberRow
+    {
+        public byte Number0 { get; set; }
+        public byte Number1 { get; set; }
+        public byte Number2 { get; set; }
+        public byte Number3 { get; set; }
+        public byte Number4 { get; set; }
+        public byte Number5 { get; set; }
+        public byte Number6 { get; set; }
+        public byte Number7 { get; set; }
+
+        public string KeyString { get; set; }
+
+        public void NumbersToKey()
+        {
+            var arr = new[]
+            {
+                Number0,
+                Number1,
+                Number2,
+                Number3,
+                Number4,
+                Number5,
+                Number6,
+                Number7
+            };
+            var longTmp = BitConverter.ToInt64(arr);
+            KeyString = longTmp.ToString();
+        }
+
+        public void KeyToNumbers()
+        {
+            var arr = BitConverter.GetBytes(long.Parse(KeyString));
+            Number0 = arr[0];
+            Number1 = arr[1];
+            Number2 = arr[2];
+            Number3 = arr[3];
+            Number4 = arr[4];
+            Number5 = arr[5];
+            Number6 = arr[6];
+            Number7 = arr[7];
+        }
+    }
+}