CalcQuick class is not serializable?

I create a CalcQuick object and create keys and finaly call the SetDirty method:

CalcQuick calcQuick = new CalcQuick();
calcQuick["A"] = "23";
calcQuick["B"] = "=[A]";
calcQuick["C"] = "=MAX([B],99)";
calcQuick["D"] = "=[C]";
calcQuick.SetDirty();
string result3 = calcQuick["D"].ToString();

So this works fine, but I need to serialize this object; however, I get the error: "Type 'Syncfusion.Calculate.CalcQuick' in Assembly 'Syncfusion.Calculate.Base, Version=4.402.0.51, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89' is not marked as serializable."

Is there no way I can serialize a CalcQuick object?

CalcQuick is not directly serializable.

But you could derive the class and serialize the strings that are cached by the object. Here is a sample that does this using serialization to an XML file to do this.

http://www.syncfusion.com/Support/user/uploads/SerializeSample_7e080feb.zip