The operators of the Danbury Ice Arena have sold the facility after 18 years of ownership.  The Hall Family and Kevin McCormack issued a statement saying they have enjoyed being part of the Danbury community and providing family oriented activities and programs for so many people over the years.   The Arena has been sold to a new ownership group, Diamond Properties, which is keeping on many of the staff members to continue offering the same programs and services.  The group plans to undertake a significant renovation and upgrade to the facility.  Diamond Properties, a real estate company headquartered in Mount Kisco, also operates Grand Prix New York Racing, Spins Hudson, and the Spins Bowl chain of entertainment centers.