In Solution Explorer, select the C# project you want to configure
build parameters on.

Next, from the Visual Studio menu bar select Project-->Properties.
The Property Pages Dialog will appear for your project.

Choose the Configuration (Release/Debug) you want to change and expand
the Configuration Properties node in the left hand pane.  Select the
"Build" node.  You can then specify where output generated by Visual
Studio is placed in the "Output Path" attribute of the Outputs
property sheet.

Be aware that the Output Path is specified seperately for each kind of
build configuration, and that setting it on one configuration doesn't
set it on all the remaining ones.

I need to make my binary and temporary files created by compiler to be
separated from the source code. bin folder could be changed using the Output
Directory section in project properties but obj folder is not moved.