Web Development

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
    public Service ()
    {
    }

    [WebMethod]
    public Foo Test1(Foo foo) 
    {
        return foo;
    }
}

public class Foo
{
    private char bar;

    [System.ComponentModel.DefaultValue(',')]
    public char Bar
    {
        get { return bar; }
        set { bar = value; }
    }
}

Server Error in '/TestWebService1' Application.<br />
--------------------------------------------------------------------------------<br />
<br />
The default value type, System.Char, is unsupported. <br />
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. <br />
<br />
Exception Details: System.Exception: The default value type, System.Char, is unsupported.<br />
<br />
Source Error: <br />
<br />
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.