Like an oasis in a sea of high density development, the area around the East Falls Church metrorail station on the Orange Line features a landscape of single-family homes, parks, and low-rise commercial development. This puts the neighborhood in marked contrast to the high- and mid-rise corridor that runs from Rosslyn to Ballston and the new townhouse and condominium development springing up at West Falls Church, Dunn Loring and Vienna. As Arlington busily builds out…