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Editorial Team
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Asked: 2026-06-14T01:45:28+00:00

I have created a WCF service and added the same as Service reference in

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I have created a WCF service and added the same as Service reference in another Windows application. It is working fine there. I have created a website and added the as project reference to the Service. Then, while trying to browse the svc file in a browser, its throws an error at my ConnectionString.

public SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["TestConnection"].ToString());

The error message is Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

What may be the possible error? Please help.

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1 Answer

  1. Editorial Team

    I have found the problem. Since I’m using that Windows and WCF Service, I need to have specify that in the web.config of service too. Adding the <appSettings> tag in the web.config tag resolve my issue. I’m not sure whether this is a correct method or not, but it did made a smile in my face. 🙂

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