how to prevents image not delete if image url exist another

Question

if delete but image url use another row in grid view

how to check condition if image url count >1 than image not delete 

 

 

 

GridViewRow row = (GridViewRow)((ImageButton)e.CommandSource).Parent.Parent;

int ImgId = (int)GridImageMaster.DataKeys[row.RowIndex].Value;

fileupload1.Value = ((Label)row.FindControl("lblImage")).Text;

FileInfo OldImage = new FileInfo(Request.PhysicalApplicationPath + "ProductImages/" + fileupload1.Value);

if (OldImage.Exists)

{

OldImage.Delete();

}