To generate web reference for you project use wsdl.exe and then including the generated file (.cs) into your project.
Based on the .NET framework version your wsdl.exe file will exist in corresponding path as below
In case anyone using VS 2008 (.NET v3.5) is also looking for the wsdl.exe.
I found it here:
C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\wsdl.exe
Future versions C:\Program Files\Microsoft SDKs\Windows\vx.xx\bin\wsdl.exe
For v4.5.1
C:\Program Files (x86)\Microsoft SDKs\Windows\v8.1A\bin\NETFX 4.5.1 Tools\wsdl.exe
For v4.6.1
C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.1 Tools\wsdl.exe
Using any one of below command can generate proxy class
wsdl /language:CS /n:”<NameSpaceName>” <Path of wsdl file>.wsdl
wsdl.exe /language:CS <Path of wsdl file>.wsdl
wsdl.exe <Path of wsdl file>.wsdl
Ref: https://docs.microsoft.com/en-us/previous-versions/dotnet/netframework-2.0/7h3ystb6(v=vs.80)?redirectedfrom=MSDN