Help - how to set WSDL minOccurs=1 for WebMethod argument properties?

[jjouett]

I'm defining a C# WebMethod where the argument has properties that are
mandatory:

[WebMethod]
public bool PerformTask(SimpleObject simpleObject)
{
....
}

where SimpleObject is as follows:

public class SimpleObject
{
private string _name;

public SimpleObject()
{
}

public string MyName
{
get
{
return _name;
}
set
{
_name = value;
}
}
}

However, upon viewing the generated WSDL associated with this object, I
see the following:

<s:complexType name="SimpleObject">
<s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="MyName"
type="s:string" />
</s:sequence>
</s:complexType>

This is a required property of the object for the application, and it
would be best to publish that fact in the generated WSDL instead of
adding application logic in my code to check this value and return an
error message if the required values are not populated. Is there any
attribute or mechanism that I can use which will result in a
specification that an object property is required in the generated WSDL
(minOccurs=1)?

Thanks in advance