Get List Field Internal Name

You can get the internal name for a column by browsing to the List Settings > Edit Column and look at the QueryString. This will be url encoded but is a simple way of retrieving the internal name without writing any code. You will get something like: /_layouts/FldEdit.aspx?List=%7B37920121%2D19B2%2D4C77%2D92FF%2D8B3E07853114%7D&Field=Product%5Fx0020%5FDescription %5F is a '_'. The field name is Product_x0020_Description. The code option is to use: string itemInternalName = item.Fields["Field Display Name"].InternalName;