using System;

using System.Data;

​

class Program

{

    static void Main(string[] args)

    {

        // Create sample tables

        DataTable table1 = CreateSampleTable1();

        DataTable table2 = CreateSampleTable2();

        DataTable table3 = CreateSampleTable3();

​

        // Combine tables into result table

        DataTable resultTable = CombineTables(new DataTable[] { table1, table2, table3 });

​

        // Display the result table

        DisplayDataTable(resultTable);

    }

​

    static DataTable CreateSampleTable1()

    {

        DataTable table = new DataTable("Table1");

        table.Columns.Add("Col1");

        table.Columns.Add("Col2");

        table.Columns.Add("Col3");

        table.Columns.Add("Col4");

​

        for (int i = 1; i <= 5; i++)

        {

            table.Rows.Add($"T1-R{i}C1", $"T1-R{i}C2", $"T1-R{i}C3", $"T1-R{i}C4");

        }

​

        return table;

    }

​

    static DataTable CreateSampleTable2()

    {

        DataTable table = new DataTable("Table2");

        table.Columns.Add("Col1");

        table.Columns.Add("Col2");

        table.Columns.Add("Col3");

​

        for (int i = 1; i <= 6; i++)

        {

            table.Rows.Add($"T2-R{i}C1", $"T2-R{i}C2", $"T2-R{i}C3");

        }

​

        return table;

    }

​

    static DataTable CreateSampleTable3()

    {

        DataTable table = new DataTable("Table3");

        table.Columns.Add("Col1");

        table.Columns.Add("Col2");

        table.Columns.Add("Col3");

        table.Columns.Add("Col4");

        table.Columns.Add("Col5");

​

        for (int i = 1; i <= 2; i++)

        {

            table.Rows.Add($"T3-R{i}C1", $"T3-R{i}C2", $"T3-R{i}C3", $"T3-R{i}C4", $"T3-R{i}C5");

        }

​

        return table;

    }

​

    static DataTable CombineTables(DataTable[] tables)

    {

        // Create the result table

        DataTable resultTable = new DataTable();

​

        // Add columns from all tables

        foreach (DataTable table in tables)

        {

            foreach (DataColumn column in table.Columns)

            {

                // Add unique columns to the result table

                if (!resultTable.Columns.Contains(column.ColumnName))

                {

                    resultTable.Columns.Add(column.ColumnName, column.DataType);

                }

            }

        }

​

        // Determine the maximum number of rows

        int maxRows = 0;

        foreach (DataTable table in tables)

        {

            if (table.Rows.Count > maxRows)

            {

                maxRows = table.Rows.Count;

            }

        }

​

        // Populate the result table

        for (int i = 0; i < maxRows; i++)

        {

            DataRow resultRow = resultTable.NewRow();

​

            foreach (DataTable table in tables)

            {

                // Fill in the data for each table

                if (i < table.Rows.Count)

                {

                    for (int j = 0; j < table.Columns.Count; j++)

                    {

                        resultRow[table.Columns[j].ColumnName] = table.Rows[i][j];

                    }

                }

            }

​

            resultTable.Rows.Add(resultRow);

        }

​

        return resultTable;

    }

​

    static void DisplayDataTable(DataTable table)

    {

        foreach (DataColumn column in table.Columns)

        {

            Console.Write(column.ColumnName + "\t");

        }

        Console.WriteLine();

​

        foreach (DataRow row in table.Rows)

        {

            foreach (var item in row.ItemArray)

            {

                Console.Write(item + "\t");

            }

            Console.WriteLine();

        }

    }

}