How to get elements path from a folder

Question

Hi everyone, I´m developing an Image Analyzer in C#, this program open an Image file an analyze it. What I now need to do is, instead of opening just 1 file ( one image ) I need to select a whole folder that contains images in order to analyze all without having to open them one by one. When I open every element of the folder what I just need to obtain is the path of the image... Can Anyone help me with this? Thank you very much!! Kelvin.