We already have Article on CSharpCorner please go through it. https://www.c-sharpcorner.com/UploadFile/4b43b4/upload-or-get-a-file-using-Asp-Net-wcf-service-on-server625/

Hi. You can follow up with this link which contains example, https://www.c-sharpcorner.com/UploadFile/4b43b4/upload-or-get-a-file-using-Asp-Net-wcf-service-on-server625/