Zoom to Selected Record & Scale Range for Graphic and feature Layer

Question

i have selected records in slData:DataGrid through query 
i want to zoom to selected record in data grid (required code C#)

and 
how to define  Scale range for  Graphic and feature layer

DominiqueBroux · Answer

please explain how to  'create an envelope around the point'

Something like:

var env = new Envelope(point.X - size/2, point.Y - size/2, point.X + size/2, point.Y + size/2);

env.SpatialReference = point.SpatialReference;

angelasuch · Answer

please explain how to  'create an envelope around the point'.

DominiqueBroux · Answer

i want to zoom to selected record in data grid

You can call Map.ZoomTo  with the geometry extent of your selected graphic.
This is working well if your geometry is a line or a polygon.
If it's a point, you have to create an envelope around the point (with a size depending on the zoom level you are expecting) and call ZoomTo with this envelope.