The Carson Valley Chamber of Commerce's annual trade show will once again be offering a evening of networking, nibbling and knickknacking all in an effort to expose the local business community.For the 12th annual Business Showcase, 3-7 p.m. April 19 at the Douglas County Fairgrounds, the chamber is reminding Valley residents and businesses of the benefits of doing business "face to face."In 2012, with the arrival of Walmart in Gardnerville, it is more important than ever for chamber member businesses to connect with residents - and the showcase is the single best way to make this happen, said Chamber Executive …