C# (CSharp) DesignPatternPrograms.StructuralDesignPatterns.FacadeDesignPattern AddressBookValidation - 2 examples found. These are the top rated real world C# (CSharp) examples of DesignPatternPrograms.StructuralDesignPatterns.FacadeDesignPattern.AddressBookValidation extracted from open source projects. You can rate examples to help us improve the quality of examples.