Server Error in '/' Application when I am running the simple method in WCF Service

Question

[when i add the method test in u-r-l it says error in server application] [this is what's inside my W.C.F service and I am trying to view method test][3]

    public string test()
    {
        // Add your operation implementation here
        return "test...";
    }

Below it the error https://i.sstatic.net/EdFt9.png

Answer 1

If you want to directly access your WCF operation in the browser, you can refer to the below configuration.
Service Contract.

    public interface IService1
    {
        [OperationContract]
        [WebGet]
        string GetData(int value);
}

Service.svc

public string GetData(int value)
        {
            return DateTime.Now.ToLongTimeString();
        }

Web Configuration, just replace the System.servicemodel section.

  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="false" />
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior>
          <webHttp/>
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <protocolMapping>
        <add binding="webHttpBinding" scheme="http" />
    </protocolMapping>    
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
  </system.serviceModel>

Result.

For more details about how to create a basic WCF Web HTTP service.
https://learn.microsoft.com/en-us/dotnet/framework/wcf/feature-details/how-to-create-a-basic-wcf-web-http-service
Feel free to let me know if there is anything I can help with.