Question: Any idea how I can append popular data on unpopular data 

```
private void Bind()
{       
    var unpopular = ChannelHelper.GetUnpopular();
    var popular = ChannelHelper.GetPopular();
    Grid.DataSource = popular + unpopular; 
    Grid.DataBind();
}

```

Answer: 
Merge these two data source in a single data source and bind the GridView to the single data source.

If these data source are DataTable or DataSet, you can use [DataTable.Merge](http://msdn.microsoft.com/en-us/library/system.data.datatable.merge.aspx) Method.
if both results returning the same object, then you can merge it

```
1- if the datatype was datatable then use Sachin idea
2- if list then use popular.Concat(Unpopular).ToList();

```

hope it will help you
regards