how to retrieve data from database in asp.net using c#

For this, just follow some simple steps which is given bellow.

1. Open Visual studio, goto file --> click New Web site --> select lcocation --> select C# as your language..
2. Open Default.aspx and Drag Gridview from ToolBar menu (Standard Control)
3. Or copy bellow code on to your .aspx form between <DIV></DIV> tag.