howdoes general solution differ from singelton solution and particular solution??? i just want to know for clearing my concept [pls pls do explain the three]

how to solve equation of the following type?

xdx +ydy , xdy +ydx, dx+-dy=0 etc ??? do we have to learn the integrals formed from them ????

 in particular solution you have to find the value of constant C while in in general you don't have to.

for xdx+ydy=0

you have to form it like:

ydy=-xdx and then integrate

i want the generilisation for all of them also guide me for the above question