using IronXL;
using System;
using System.Data;

// Supported for XLSX, XLS, XLSM, XLTX, CSV and TSV
WorkBook workBook = WorkBook.Load("sample.xlsx");

// Convert the whole Excel WorkBook to a DataSet
DataSet dataSet = workBook.ToDataSet();

foreach (DataTable table in dataSet.Tables)
{
    Console.WriteLine(table.TableName);

    // Enumerate by rows or columns first at your preference
    foreach (DataRow row in table.Rows)
    {
        for (int i = 0; i < table.Columns.Count; i++)
        {
            Console.Write(row[i]);
        }
    }
}

Imports IronXL
Imports System
Imports System.Data

' Supported for XLSX, XLS, XLSM, XLTX, CSV and TSV
Private workBook As WorkBook = WorkBook.Load("sample.xlsx")

' Convert the whole Excel WorkBook to a DataSet
Private dataSet As DataSet = workBook.ToDataSet()

For Each table As DataTable In dataSet.Tables
	Console.WriteLine(table.TableName)

	' Enumerate by rows or columns first at your preference
	For Each row As DataRow In table.Rows
		For i As Integer = 0 To table.Columns.Count - 1
			Console.Write(row(i))
		Next i
	Next row
Next table