static void Main(string[] args) { ///set a defult value to init the arrys later//// int NumOfPepole = 7; //////////////create the arrys Person[] PersonArr = new Person[NumOfPepole]; Signature[] signatureArr = new Signature[NumOfPepole]; ///////init the person arr///////////////// for (int i = 0; i < PersonArr.Length; i++) { PersonArr[i] = new Person(); } ///////////////init each person name,want to sign and signature///////// PersonArr[0].FullName = "Bob Arnold"; PersonArr[0].WantToSign = true; PersonArr[0].PersonSignature += (string param) => { return(param.ToLower()); }; ///////////////////////////////////////////////// PersonArr[1].FullName = "Alice Avery"; PersonArr[1].WantToSign = true; PersonArr[1].PersonSignature += (string param) => { string[] name = param.Split(' '); return(name[0] + name[1]); }; /////////////////////////////////////////////////// PersonArr[2].FullName = "Albert Bailey"; PersonArr[2].WantToSign = true; PersonArr[2].PersonSignature += (string param) => { string [] name = param.Split(' '); string firstname = name[0]; string lastname = name[1]; string firstLetter = Convert.ToString(firstname[0]); string LastLetter = Convert.ToString(lastname[0]); return(firstLetter + LastLetter); }; /////////////////////////////////////////////////// PersonArr[3].FullName = "Matt Baker"; PersonArr[3].WantToSign = false; PersonArr[3].PersonSignature += (string param) => { string[] name = param.Split(' '); string firstname = name[0]; char firstLetter = firstname[0]; return(Convert.ToString(firstLetter + name[1])); }; /////////////////////////////////////////////////// PersonArr[4].FullName = "Carol Cambell"; PersonArr[4].WantToSign = true; PersonArr[4].PersonSignature += (string param) => { return(param.ToUpper()); }; /////////////////////////////////////////////////// PersonArr[5].FullName = "Kavin Brown"; PersonArr[5].WantToSign = false; PersonArr[5].PersonSignature += (string param) => { string[] name = param.Split(' '); return(name[0] + "." + name[1]); }; /////////////////////////////////////////////////// PersonArr[6].FullName = "Lisa Bower"; PersonArr[6].WantToSign = true; PersonArr[6].PersonSignature += (string param) => { string[] name = param.Split(' '); return(name[0].ToLower()); }; //////////////////////////////////////////////////////// //////////////////init the siganture arr ////////////////////// for (int i = 0; i < PersonArr.Length; i++) { signatureArr[i] = new Signature(PersonArr[i].FullName, PersonArr[i].SignAction(PersonArr[i].FullName)); } //////////////print the signature arr on the console screen/////////////////// foreach (Signature item in signatureArr) { Console.WriteLine($"person name: {item.FullName}"); if (item.FullSignature == null) { Console.WriteLine("I dont want to sign"); } else { Console.WriteLine($"person signature: {item.FullSignature}"); } Console.WriteLine("------------------------------------------"); } }