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Hi,

I'm looking for a way to specify that some MessageBodyMember is required, so that the generated schema would have minOccurs=1 instead of minOccurs=0.

I know that the DataMember has such an option(IsRequired=true), however I prefer using the MessageContract for controlling other aspects of the message.

[MessageContract(IsWrapped = true, WrapperName = "CityRequestObject")]
public class CityInfoRequest
{
   
    [MessageHeader]
    public string UserKey { get; set; }
    [MessageHeader]
    public string TransactionID { get; set; }
    [MessageHeader]
    public string EntityCode { get; set; }
    [MessageBodyMember]
 
    public string Lang { get; set; }

}