merge feature in SDE -arcgis engine C#

Question

I have some selected feature as Polygon in SDE geo database show in map control. They are side-by-side features but now I want to merge them into one by code . How can I do this, anyone has any example code ?
I use ArcGIS engine 9.3 and C#
thank you 
Cuongdx

dangxuantien · Answer

Hi Mr Cuong,

I am in Viet Nam, maybe this is the same as you.

now, i am researching about arcengine with C# and I have many merge and split polygon.

please help me!

dangxuantien29@gmail.com

doxuan_cuong · Answer

I used to use this code but I can't union 2 adjacent polygons, result return only one polygon (polygon 1 to union ). Two polygons don't intersect , just have a common segment. How can I fix that?

tuxedo · Answer

code sample :http://gis.stackexchange.com/questions/12154/fastest-way-to-merge-a-feature
It's the best solution to merge polygons in sharpfile but not work with SDE. 
Hope this helps