i am using ironxl to import excel data into C# dictionary and i am unable to run the script

public Dictionary<string, int> ReadInputData_3()
{

// Check if the file exists

Dictionary<string, int> dataDictionary = new Dictionary<string, int>();
WorkBook workBook =   WorkBook.Load("..\..\..\ModbusTestJig.Helpers\Input_data\Input_data.xlsx");
//WorkSheet workSheet = workBook.WorkSheets.First();
WorkSheet workSheet = workBook.WorkSheets[0];
foreach (var row in workSheet.Rows)
{
    var key = row.Columns[0].Value.ToString(); // Assuming key is in the first column (column index 0)
    var value = row.Columns[1].Value.ToString(); // Assuming value is in the second column (column index 1)

    if (!string.IsNullOrEmpty(key))
    {
        dataDictionary.Add(key,int.Parse(value));
        //dataDictionary[key] = value;
    }
}


return dataDictionary;

}