Oh, yes. I know it. But the word "distance" lets me think about points on a surface and about simple geometric task. :)

It's not a question. :| If you have a complete set of distances (edges) between every two of all points then the shortest way between two given points will be line segment that connects these two points. If you mean one of typical graph problems then try reading this article.

:~ Pls, formalize your task with more details: street net complexity, number of projected routs, population density and distribution over a city and so on. Though the GA is very simple for realization, the information you have supplied is too poor. P.S. Your post sounds like you don't know what you want.

IMHO the most simple solution will be to write data in binary mode. After that data will be automatically reformatted according to local settings of the target computer while reading.

Search the property Text of ColumnHeader object. Example: ListView1.Columns[0].Text = "My Favorite Column";