show image in picturebox from project folder

Question

It faild to load image in picturebox when i m using this code:

 

pictureBox1.Image = Image.FromFile(@"C:\Users\Admin\source\repos\New folder\Software of TE\Software of TE\Images\"+ str);

 

But When i m using this code Image load Successfully:

 

pictureBox1.Image = Image.FromFile(@"C: /Users/Admin/source/repos/Software of TE/Software of TE/images/Washer.Jpg");

 

So please give me the solution to load all images from folder.