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Developer technologies | Visual Studio | Setup
The process of installing, configuring, and customizing Visual Studio to support development workflows across languages, platforms, and workloads.
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Hi @Mark Shen ,
Welcome to Microsoft Q&A!
For your requirement, please view the document to add Web Service (ASMX) file in VS 2019: right-click your project > Add > New Item… > search Web Service (ASMX) > click on Add.
Sincerely,
Anna
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