ServiceDescription Class

// Obtain the ServiceDescription of existing Wsdl.
ServiceDescription myDescription = ServiceDescription.Read("MyWsdl_CS.wsdl");
// Remove the Binding from the Binding Collection of ServiceDescription.
BindingCollection myBindingCollection = myDescription.Bindings;
myBindingCollection.Remove(myBindingCollection[0]);

// Form a new Binding.
Binding myBinding = new Binding();
myBinding.Name = "Service1Soap";
XmlQualifiedName myXmlQualifiedName = 
                     new XmlQualifiedName("s0:Service1Soap");
myBinding.Type = myXmlQualifiedName;

SoapBinding mySoapBinding = new SoapBinding();
mySoapBinding.Transport = "http://schemas.xmlsoap.org/soap/http";
mySoapBinding.Style = SoapBindingStyle.Document;

OperationBinding addOperationBinding = 
       CreateOperationBinding("Add",myDescription.TargetNamespace);
myBinding.Operations.Add(addOperationBinding);
myBinding.Extensions.Add(mySoapBinding);

// Add the Binding to the ServiceDescription.
myDescription.Bindings.Add(myBinding);
myDescription.Write("MyOutWsdl.wsdl");