private void TransactionReport_Load(object sender, EventArgs e)
        {
            //grdTransactionDetails.DataSource = transactions.GetAll();

            grdTransactionDetails.AutoGenerateColumns                  = false;
            grdTransactionDetails.Columns["Id"].DataPropertyName       = "Id";
            grdTransactionDetails.Columns["Medicine"].DataPropertyName = "MedicineId";
            grdTransactionDetails.Columns["Amount"].DataPropertyName   = "Amount";
            grdTransactionDetails.Columns["Profit"].DataPropertyName   = "Profit";
            grdTransactionDetails.Columns["Date"].DataPropertyName     = "Date";

            List <Transaction> transaction = new List <Transaction>();

            transaction = transactions.GetAll();
            grdTransactionDetails.DataSource = transaction;
        }