UI unresposive on a long-time for loop C# WinForm

I have a WinForm Application that reads data from an excel file using Spreadsheetlight, There is a method that reads the information then do some calculation an then I create a new excel File.

The problem is that this file has about 100,000 records and I have a label in the UI that I want to update every time I read an excel row, but the label just seems unresponsive;

 public List<DataRow> GeExcelData(string filePath)
 {
        var myTable = new List<DataRow>();
        int row = 0;
        using (var input = new SLDocument(filePath))
        {
            SLWorksheetStatistics stats = input.GetWorksheetStatistics();
            int iStartColumnIndex = stats.StartColumnIndex;

            progressBar1.Minimum = 0;
            progressBar1.Maximum = stats.EndRowIndex;
            progressBar1.Step = 1;
            for (row = stats.StartRowIndex + 1; row <= stats.EndRowIndex; ++row)
            {
                //Here is the label
                lblStatus.Text = "Reading row " + row + " of " + stats.EndRowIndex;
                var dataRowTmp = new DataRow()
                {
                    name = input.GetCellValueAsString(row, iStartColumnIndex),
                    sku = input.GetCellValueAsString(row, iStartColumnIndex + 1),
                    value2 = input.GetCellValueAsString(row, iStartColumnIndex + 2),
                    value3 = input.GetCellValueAsString(row, iStartColumnIndex + 3)
                };
                progressBar1.PerformStep();
                myTable.Add(dataRowTmp);
            }
            lblStatus.Text = "";
            progressBar1.Value = 0;
        }
        return myTable;
    }

Is there a way to update the UI efficiently, while doing some long-running tasks. Because is just a label I don't want to write some complex code. Also I have the progressBar1 that works fine.