public static void getExpresion()
{
NewCustomer nc1 = new NewCustomer("", "");
try
{
if (IsNullOrWhiteSpace(nc1.Address))
{
throw new ArgumentException(message: "No address found", paramName: nameof(nc1.Address));
}
}
catch (ArgumentException aex)
{
Console.WriteLine(aex.Message);
}
}
public static void Add(this Sales e, NewCustomer s) => e.Add_Customer(s);
static void Main(string[] args)
{
int x = 4;
//OldCustomer use for c# below 6.0
//NewCustomer use for c# 6.0
string feature = string.Empty;
feature = "-------------------read only auto property--------------------";
Console.WriteLine($"{feature}");
//Before C# 6.0
OldCustomer oldCus = new OldCustomer();
oldCus.set_customer_name("Barack", "Obama");
Console.WriteLine("First Name: {0}, Last Name: {1}", oldCus.FirstName, oldCus.LastName);
//After C# 6.0
NewCustomer newCus = new NewCustomer("Donald", "Trump");
Console.WriteLine($"First Name: {newCus.FirstName}, Last Name: {newCus.LastName}");
feature = "\n---------------Expression bodied member function--------------";
Console.WriteLine($"{feature}");
//Before C# 6.0
Console.WriteLine("Full Name: {0}", oldCus.FullName);
//After C# 6.0
Console.WriteLine($"Full Name: {newCus.FullName}");
feature = "\n------------------Using static in namespace------------------";
Console.WriteLine($"{feature}");
//Before C# 6.0 => import all types from a namesspace
Console.WriteLine("Sqrt of {0}: {1}", x, Math.Sqrt(x));
//After C# 6.0 => import only member functionns from a namesspace
Console.WriteLine($"Sqrt of {x}: {Sqrt(x)}");
feature = "\n-------------- Null-conditional operators---------------------";
Console.WriteLine($"{feature}");
NewCustomer nc1 = new NewCustomer("", "");
//Before C# 6.0
if (nc1 != null)
{
var result = nc1.Address ?? "Newly Set";
Console.WriteLine("Value: {0}", result);
}
//After C# 6.0
var res = nc1?.Address ?? "Hello";
Console.WriteLine($"Value: {res}");
feature = "\n----------------String Interpolation---------------------";
Console.WriteLine($"{feature}");
Console.WriteLine($"Customer Name: {nc1.FullName}, Total Amount: {nc1.GetTotalAmount()}");
feature = "\n----------------Expression---------------------";
Console.WriteLine($"{feature}");
getExpresion();
feature = "\n----------------Index Initializer---------------------";
Console.WriteLine($"{feature}");
//Before C# 6.0
List <string> messages = new List <string> {
"Hello - 120",
"Hello - 90",
"Hello - 130"
};
//After C# 6.0
Dictionary <int, string> dic = new Dictionary <int, string>
{
[120] = "Hello - 120",
[90] = "Hello - 90",
[130] = "Hello - 130"
};
//Console.WriteLine(dic[120]);
foreach (var item in dic)
{
Console.WriteLine($"Index: {item.Key}, Value: {item.Value}");
}
feature = "\n----------------Collection Initializer---------------------";
Console.WriteLine($"{feature}");
var trans = new Sales()
{
new NewCustomer("James", "Wodman"),
new NewCustomer("Radiq", "Fables"),
new NewCustomer("Doz", "Huber")
};
Console.ReadKey();
}
