How to use web service using wsdl file using c# ?

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C#3.5

XSD

WSDL

Hello ,
I want to use

https://www2.agenciatributaria.gob.es/ADUA/internet/es/aeat/dit/adu/adrx/ws/IE615V2.wsdl[^]

in my C# project , i have added its reference in my project , but now i dont know how to call IE615V2() and get response from that.

For testing , i have tried to import it in Soapui tool , when I import its giving error about Alphanumeric_Max35 , which is available in IE616V2Sal.xsd , IE628V2Sal.xsd , IE919V2Sal.xsd.These .xsd files are imported.

So if any body have some idea , response here.
Thank you.