public static void MainMethod()
{
ConstructorTestClass2 c2 = new ConstructorTestClass2()
{
String1 = "String1",
String2 = "String2"
};
ConstructorTestClass1 c1 = new ConstructorTestClass1(c2);
// Error
string c1String = JsonConvert.SerializeObject(c1);
Console.WriteLine(c1String);
/*
* If we need to deserialize a string to target class, we need a empty constructor in the class.
* Or it will throw the exception:
* System.NullReferenceException: 'Object reference not set to an instance of an object.'
* t2 was null.
*/
c1 = JsonConvert.DeserializeObject <ConstructorTestClass1>(c1String);
// We cannot use new ConstructorTestClass1() to instantiate an object if there is not an empty constructor in the class
//c1 = new ConstructorTestClass1();
}
/*
* If there is not another constructor function with input parameters in the class,
* there is an empty constructor by default in the class.
* But if there is another constructor function with input parameters in the class，
* we need to define the empty constructor if we need it.
*/
//public ConstructorTestClass1()
//{
//}
public ConstructorTestClass1(ConstructorTestClass2 t2)
{
this.String1 = t2.String1;
this.String2 = t2.String2;
}