Thanks For the reply. I solved the problem. Problem i had was columns generated automatically and there was no way to change properties.
Following is the snippet i have used.
Code:
Protected Sub GridDun_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridDun.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then
For i As Integer = 0 To e.Row.Cells.Count - 1
e.Row.Cells(i).Text = Server.HtmlDecode(e.Row.Cells(i).Text)
Next
End If
End Sub