How to add an underscore to WebMethod name

Hi, guys,

One of my clients was required by the hospital to name their webservice operation as Action_Subject, ie. Get_PatientInfo

When I define the web method as "Get_PatientInfo" as below,

/// MyApp.MyService
Class MyApp.MyService Extends %SOAP.WebService [ ProcedureBlock ]
{

/// Name of the WebService.
Parameter SERVICENAME = "MyService";

/// TODO: change this to actual SOAP namespace.
/// SOAP Namespace for the WebService
Parameter NAMESPACE = "http://tempuri.org";

/// Namespaces of referenced classes will be used in the WSDL.
Parameter USECLASSNAMESPACES = 1;

/// TODO: add arguments and implementation.
/// Test
Method "Get_PatientInfo"() As %String [ WebMethod ]
{
    Quit "Test"
}

}

the code can not be compiled because of the following error:

Compilation started on 06/04/2018 12:48:09 with qualifiers 'cuk /checkuptodate=expandedonly'
Compiling class MyApp.MyService
ERROR #5802: Datatype validation failed on property '%Dictionary.ClassDefinition:IsValid', with value equal to "MyApp.MyService.Get_PatientInfo"
  > ERROR #5802: Datatype validation failed on property '%Dictionary.ClassDefinition:Name', with value equal to "MyApp.MyService.Get_PatientInfo"
    > ERROR #5490: Error running generator for method 'OnCompile:MyApp.MyService' 
ERROR: %SOAP.WebBase.cls(OnCompile) of generated code compiling subclass 'MyApp.MyService'
      > ERROR #5030: An error occurred while compiling class 'MyApp.MyService'
Compiling routine MyApp.MyService.1

If we can not name the method as required, is there any other way to do that? Thanks.