App.config is not generating

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C#

Binding

endpoint

I have added a service reference i.e. a WSDL in my .NET visual studio code. But its not generating app.config file. I have also tried using the svcutil.exe in visual studio command prompt. I have also tried unchecking the 'Resuse types in referenced assemblies' by clicking the Advanced button while adding the service reference. But still App.config file is not generating.

So I have added the following code in my class. But still it is giving the error'could not find default endpoint element that references contract'.

client = new SalesLeadServiceClient();
_client.ClientCredentials.UserName.UserName = "***";
_client.ClientCredentials.UserName.Password = "***";

EndpointAddress endPointAddr = new EndpointAddress(address);
BasicHttpBinding binding = new BasicHttpBinding(BasicHttpSecurityMode.TransportWithMessageCredential);
binding.Security.Message.ClientCredentialType = BasicHttpMessageCredentialType.UserName;
_client = new SalesLeadServiceClient(binding, endPointAddr);
BindingElementCollection elements = _client.Endpoint.Binding.CreateBindingElements();
elements.Find<SecurityBindingElement>().IncludeTimestamp = false;
_client.Endpoint.Binding = new CustomBinding(elements);
igcomp.PrepareConnectSession(_client.ChannelFactory);

It will be grateful if anyone can suggest any solution on this?