ASP.NET HttpApplication からすべての Event key object を取得する

HttpApplicationExtentions.tt

<#@ template debug="false" hostspecific="false" language="C#" #>
<#@ assembly name="System.Core" #>
<#@ assembly name="System.Web" #>
<#@ output extension="EventKeys.cs" #>
<#@ import namespace="System.Web" #>
<#@ import namespace="System.Reflection" #>
<#@ import namespace="System.Linq" #>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Reflection;

namespace Kazuk.Dark
{
    public static partial class HttpApplicationExtentions
    {
<#
    Type t = typeof(System.Web.HttpApplication);
    var eventFields= 
        typeof(System.Web.HttpApplication)
        .GetFields( BindingFlags.NonPublic | BindingFlags.Static )
        .Cast<FieldInfo>()
        .Where( f=>f.Name.StartsWith( "Event", StringComparison.Ordinal ) );
    foreach( var field in eventFields )
    {
#>
        public static readonly object <#=field.Name#>;
<#
    }
#>
        public static HttpApplicationExtentions()
        {
            const BindingFlags NonPubStatic 
                = BindingFlags.NonPublic | BindingFlags.Static;
            Func<Type, string, object> getFieldValue 
                = (t,n ) =>
                    t.GetField(n, NonPubStatic)
                     .GetValue(null);

            Type httpAppType = typeof(HttpApplication);
<#
    foreach( var field in eventFields )
    {
#>
            <#=field.Name#> =
                getFieldValue( httpAppType, "<#=field.Name#>" );
<#
    }
#>
        }
    }
}