How to merge two Excel workbook into one workbook in C#?

Question

Let us consider that I have two Excel files (Workbooks) in local. Each Excel workbook is having 3 worksheets.

Lets say WorkBook1 is having Sheet1, Sheet2, Sheet3

Answer 1

 System.Data.Odbc.OdbcDataAdapter Odbcda;

//CSV File
strConnString = "Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq=" + SourceLocation + ";Extensions=asc,csv,tab,txt;Persist Security Info=False";

sqlSelect = "select * from [" + filename + "]";

System.Data.Odbc.OdbcConnection conn = new System.Data.Odbc.OdbcConnection(strConnString.Trim());

conn.Open();
Odbcda = new System.Data.Odbc.OdbcDataAdapter(sqlSelect, conn);
Odbcda.Fill(ds, DataTable);
conn.Close();

• This would read the contents of an excel file into a dataset.
• Create multiple datasets like this and then do a merge.

Code taken directly from here.