How I can upload image to server using web api ? please help me

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MVC5

WebAPI2

i want to upload image to server using web api in mvc dot net.
i am new at learning of Web Api and i want to upload image to server using web api.
please guide me how i can do this.

What I have tried:

                            string img = username + "_" + labTestId + fb;
                            var element2 = image;
                            MemoryStream ms = new MemoryStream(Convert.FromBase64String(element2));
                            byte[] imagesbytes = ms.ToArray();
                            string folder_name = "lab-orders";
                            folder_name = folder_name.ToLower();
                            string SaveLocation = ServerConfig.BlobPath + folder_name + "/" + fb+imagesbytes;
                            BlobUploader.UploadTo(folder_name,img, ms);
var filePath =HttpContext.Current.Server.MapPath(SaveLocation + postedFile.FileName + extension);

 postedFile.SaveAs(filePath);