polygon - Converting multiple lines into single line using ArcGIS Desktop?

I've no idea if this is basic or what but I have this data that contains multiple lines (forming a polygon shape). I want to convert those lines (multiple - each with a start and end point) to a single line. I tried dissolve, multipart to single part etc. I cannot use topology since it influences precision. I have zero knowledge of programming.

Answer

Try dissolving based off of OBJECTID or FID. Then use Feature To Polygon (Data Management) to convert your polylines to polygons if you wish. To illustrate, here are some sample lines:

Attribute table before dissolve by OBJECTID

Attribute table after dissolve by OBJECTID