using System;

using System.Data;

​

public class Program

{

    public static void Main()

    {

        DataTable table = GenerateTable();

        bool deleteColumn = false;

        foreach (DataColumn c in table.Columns){

            foreach (DataRow r in table.Rows){

                if (String.IsNullOrWhiteSpace(r["Test3"].ToString())){ 

                deleteColumn = true;

                }

                else {

                deleteColumn = false;

                break;

                }

            }

        }

        Console.WriteLine("Delete Column: " + deleteColumn);

    }

​

    public static DataTable GenerateTable()

    {

        DataTable table = new DataTable();

        table.Columns.Add("Name", typeof (String));

        table.Columns.Add("Age", typeof (Int32));

        table.Columns.Add("Test2", typeof (String));

        table.Columns.Add("Test3", typeof (String));

        DataRow row1 = table.NewRow();

        row1["Name"] = "Fredy";

        row1["Age"] = "31";

        row1["Test2"] = "Cheese";

        row1["Test3"] = "";

        DataRow row2 = table.NewRow();

        row2["Name"] = "Fredy";

        row2["Age"] = "31";

        row2["Test2"] = "Cheese";

        row2["Test3"] = "";

        DataRow row3 = table.NewRow();

        row3["Name"] = "Fredy";

        row3["Age"] = "31";

        row3["Test2"] = "Cheese";

        row3["Test3"] = " ";

        table.Rows.Add(row1);

        table.Rows.Add(row2);

        table.Rows.Add(row3);

        foreach (DataRow d in table.Rows)

        {

            Console.WriteLine(d["Name"] + " | " + d["Age"] + " | " + d["Test2"] + " | " + d["Test3"] + " | ");

        }

        return table;

    }

}