SoapHeader.EncodedMustUnderstand Property

// MyHeader class is derived from the SoapHeader class.
MyHeader customHeader = new MyHeader();
customHeader.MyValue = "Header value for MyValue";

// Set the EncodedMustUnderstand property to true.
customHeader.EncodedMustUnderstand = "1";

WebService_SoapHeader_EncodedMustUnderstand myWebService = 
    new WebService_SoapHeader_EncodedMustUnderstand();
myWebService.MyHeaderValue = customHeader;
string results = myWebService.MyWebMethod1();
Console.WriteLine(results);
try
{
    results = myWebService.MyWebMethod2();
}
catch(Exception myException)
{
    Console.WriteLine("Exception raised in MyWebMethod2.");
    Console.WriteLine("Message: " + myException.Message);
}