Associated blog article http://jason-mitchell.com/asp-net-programming/t4-templating-to-generate-code-for-asp-net-mvc-actions/

ActionExtensions.tt

<#@ template debug="true" hostSpecific="true" #>
<#@ output extension=".cs" #>
<#@ Assembly Name="System.Core" #>
<#@ Assembly Name="System.Windows.Forms" #>
<#@ Assembly Name="System.Web.Mvc" #>
<#@ assembly name="$(SolutionDir)MyProject.WebApplication\bin\MyProject.WebApplication.dll" #>
<#@ import namespace="System" #>
<#@ import namespace="System.IO" #>
<#@ import namespace="System.Diagnostics" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Collections" #>
<#@ import namespace="System.Collections.Generic" #> 
<#@ import namespace="System.Reflection" #>
<#@ import namespace="System.Web.Mvc" #>
<#@ import namespace="Hermes.WebApplication.Controllers" #>
<#
	Type[] controllerTypes = Assembly.GetAssembly(typeof(AccountController)).GetTypes().Where(t => String.Equals(t.Namespace, "MyProject.WebApplication.Controllers", StringComparison.Ordinal)).ToArray();

	var actionMethods = controllerTypes.SelectMany(x => x.GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
	var actionDefinitions = from method in actionMethods
							where method.CustomAttributes.All(x => x.AttributeType != typeof(HttpPostAttribute))
							let actionNameAttr = method.CustomAttributes.SingleOrDefault(x => x.AttributeType == typeof(ActionNameAttribute))
							let actionName = actionNameAttr != null ? actionNameAttr.ConstructorArguments.First().Value : method.Name
							let controllerName = method.DeclaringType.Name.Substring(0, method.DeclaringType.Name.Length - "Controller".Length)
							let methodNameBase = string.Format("{0}{1}", controllerName, method.Name)
							select new
							{
								MethodNameBase = methodNameBase,
								ActionLinkMethodName = string.Format("{0}ActionLink", methodNameBase),
								ControllerName = controllerName,
								ActionName = actionName
							};
#>
/*
 ***************************************************************************************************************
 * WARNING: Do not edit this class.  It is automatically generated using T4 and any changes will be overwritten*
 ***************************************************************************************************************
 */

using System.Web.Mvc;
using System.Web.Mvc.Html;
using Hermes.WebApplication.Controllers;

namespace Hermes.WebApplication.Extensions
{
	public static class ActionLinkExtensions
	{
<#foreach(var actionDefinition in actionDefinitions){#>
		// ActionLink to: <#=actionDefinition.ControllerName#>Controller.<#=actionDefinition.ActionName#>
		public static MvcHtmlString <#=actionDefinition.ActionLinkMethodName#>(this HtmlHelper htmlHelper, string linkText)
		{
			return htmlHelper.<#=actionDefinition.ActionLinkMethodName#>(linkText, null, null);
		}

		public static MvcHtmlString <#=actionDefinition.ActionLinkMethodName#>(this HtmlHelper htmlHelper, string linkText, object routeValues)
		{
			return htmlHelper.<#=actionDefinition.ActionLinkMethodName#>(linkText, routeValues, null);
		}

		public static MvcHtmlString <#=actionDefinition.ActionLinkMethodName#>(this HtmlHelper htmlHelper, string linkText, object routeValues, object htmlAttributes)
		{
			return htmlHelper.ActionLink(linkText, "<#=actionDefinition.ActionName#>", "<#=actionDefinition.ControllerName#>", routeValues, htmlAttributes);
		}

<#}#>
	}

	public static class ActionUrlExtensions
	{
<#foreach(var actionDefinition in actionDefinitions){#>
		// Url for: <#=actionDefinition.ControllerName#>Controller.<#=actionDefinition.ActionName#>
		public static string <#=actionDefinition.MethodNameBase#>(this UrlHelper urlHelper)
		{
			return urlHelper.<#=actionDefinition.MethodNameBase#>(null);
		}

		public static string <#=actionDefinition.MethodNameBase#>(this UrlHelper urlHelper, object routeValues)
		{
			return urlHelper.Action("<#=actionDefinition.ActionName#>", "<#=actionDefinition.ControllerName#>", routeValues);
		}

<#}#>
	}
}