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