c# Soap Client Issue - more than one endpoint configuration for th at contract was found

In your App.config you can see some thing like this

 <client>
      <endpoint address="https://www.imailtest.co.uk/webservice/imail_api.asmx "
        binding="basicHttpBinding" bindingConfiguration="xxxxxxxxxx"
        contract="xxxxxxxxxx" name="xxxxxxxxxxxxx" />
      <endpoint address="https://www.imailtest.co.uk/webservice/imail_api.asmx"
        binding="customBinding" bindingConfiguration="xxxxxxxxxxxxx"
        contract="xxxxxxxxxxx" name="xxxxxxxxxxxxx" />
  </client>

remove the second endpoint and now it should be like this

<client>
      <endpoint address="https://www.imailtest.co.uk/webservice/imail_api.asmx "
        binding="basicHttpBinding" bindingConfiguration="xxxxxxxxxxxxx"
        contract="xxxxxxxxxxxxxx" name="xxxxxxxxxxxxxxx" />      
  </client>

now run the code , hope your code works fine

I believe the problem is solved via defining the contract name like so (based on my screenshot):

ServiceReference1.imail_apiSoapClient soapClient = 
new ServiceReference1.imail_apiSoapClient("imail_apiSoap");

Now, I am no longer getting an error and the api appears to be working.

[Solved! just add the End point in the webservice's proxy class asp below screen shot