Now it works reading in different transactionsheets from excel

WinFormDi.BLI/IExcellent.cs

@@ -1,12 +1,13 @@
 namespace WinFormDiApp.BLR
 {
-    public interface IExcel
+    public interface IExcellent
     {
         int Columns { get; set; }
         string DataType { get; set; }
         int Rows { get; set; }
 
         void Dispose();
+        void ExcellentStart(string path, int Sheet);
         string ReadCell(int i, int j);
     }
 }