LogEventAttribute.cs

using System;

[AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
public class LogEventAttribute : Attribute
{
    public string[] ParamNames
    {
        get { return _paramNames; }
    }

    string[] _paramNames;

    public LogEventAttribute (params string[] paramNames)
    {
        _paramNames = paramNames;
    }
}