I added a default constructor.
(Here is my class...)

[Serializable]
public class POClass {
[Property(typeof(PropertySchemas.IDs))]
public string ID;

public string Item;
public POClass() { }
}


Still...
a compile error "a class must have a default constructor to be serialized by
mlSerializer" reported.


I think...

Although there is no default constructor specified in class definition...
default constructor is provided implicitly when there is no any other
constructors.

so...
"a class must have a default constructor to be serialized by XmlSerializer"
means...a class should not be like this...
public class POClass {
[Property(typeof(PropertySchemas.IDs))]
public string ID;

public string Item;
public POClass(string s) { ID = s; }
}


So...
I solved the xml-serializable problem
by adding an attribute that control XML serialization....


[Serializable]
public class POClass
{
[Property(typeof(PropertySchemas.IDs))]
[XmlRootAttribute("PO")]
public string ID;

public string Item;
}

I feel...
this is not the right way to solve the compile error.

Plz...
comment me more...

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