[ServiceContract]
public interface IUserService
{
    // GET方法示例 - 获取用户信息
    [OperationContract]
    [WebGet(UriTemplate = "users/{id}", ResponseFormat = WebMessageFormat.Json)]
    User GetUser(string id);

    // POST方法示例 - 创建用户
    [OperationContract]
    [WebInvoke(Method = "POST", UriTemplate = "users", 
               RequestFormat = WebMessageFormat.Json, 
               ResponseFormat = WebMessageFormat.Json)]
    User CreateUser(User user);
    
    // PUT方法示例 - 更新用户
    [OperationContract]
    [WebInvoke(Method = "PUT", UriTemplate = "users/{id}", 
               RequestFormat = WebMessageFormat.Json)]
    void UpdateUser(string id, User user);
    
    // DELETE方法示例 - 删除用户
    [OperationContract]
    [WebInvoke(Method = "DELETE", UriTemplate = "users/{id}")]
    void DeleteUser(string id);
}

public class UserService : IUserService
{
    public User GetUser(string id)
    {
        // 实现获取用户逻辑
        return new User { Id = id, Name = "John Doe" };
    }

    public User CreateUser(User user)
    {
        // 实现创建用户逻辑
        user.Id = Guid.NewGuid().ToString();
        return user;
    }

    public void UpdateUser(string id, User user)
    {
        // 实现更新用户逻辑
    }

    public void DeleteUser(string id)
    {
        // 实现删除用户逻辑
    }
}

<system.serviceModel>
  <services>
    <service name="YourNamespace.UserService">
      <endpoint address="" 
                binding="webHttpBinding" 
                contract="YourNamespace.IUserService" 
                behaviorConfiguration="webBehavior" />
    </service>
  </services>
  <behaviors>
    <endpointBehaviors>
      <behavior name="webBehavior">
        <webHttp />
      </behavior>
    </endpointBehaviors>
  </behaviors>
</system.serviceModel>