Lets create a project and name it Demo. Write following code on default.aspx.cs

DataTable dt = new DataTable("Order");
DataColumn dc = dt.Columns.Add("ID", typeof(int));
dt.Columns.Add("Name", typeof(String));

dt.Rows.Add(1, "pramod");
dt.Rows.Add(2, "ravi");
dt.Rows.Add(3, "deepak");
dt.Rows.Add(4, "kiran");
dt.Rows.Add(5, "madhu");

Set a breakpoint on line dt.Rows.Add(5,”madhu”) and hit F5. Mouseover on dt and afterthat click on arrow icon and you will get this screen.

After clicking on DataTable visualizer you will get this.

Output

Now create an another datatable.

DataTable dt2 = new DataTable("Order");
DataColumn dc2 = dt2.Columns.Add("ID", typeof(int));
dt2.Columns.Add("Name", typeof(String));
dt2.Columns.Add("Type", typeof(String));

dt2.Rows.Add(6, "ashu","Gen");
dt2.Rows.Add(7, "rudra", "Gen");
dt2.Rows.Add(8, "kavita", "Gen");
dt2.Rows.Add(9, "suman", "Gen");
dt2.Rows.Add(10, "lakshman", "Gen");

Set a breakpoint on line dt2.Rows.Add(10, “lakshman”, “Gen”) and hit F5.
Output

// Add both datatable in single datatable.
dt.Merge(dt2);

Output

I hope you enjoy this article.

Happy coding