R – Suggestions on How to Migrate Website from ASP.net 1.1/2.0 to 3.5

For MVC v5.1 use Html.EnumDropDownListFor

@Html.EnumDropDownListFor(
    x => x.YourEnumField,
    "Select My Type", 
    new { @class = "form-control" })

For MVC v5 use EnumHelper

@Html.DropDownList("MyType", 
   EnumHelper.GetSelectList(typeof(MyType)) , 
   "Select My Type", 
   new { @class = "form-control" })

For MVC 5 and lower

I rolled Rune's answer into an extension method:

namespace MyApp.Common
{
    public static class MyExtensions{
        public static SelectList ToSelectList<TEnum>(this TEnum enumObj)
            where TEnum : struct, IComparable, IFormattable, IConvertible
        {
            var values = from TEnum e in Enum.GetValues(typeof(TEnum))
                select new { Id = e, Name = e.ToString() };
            return new SelectList(values, "Id", "Name", enumObj);
        }
    }
}

This allows you to write:

ViewData["taskStatus"] = task.Status.ToSelectList();

by using MyApp.Common

ASP.NET 2.0 is simply an ASP.NET application running under the 2.0 CLR. This is configured in the properties for the application in the IIS manager.

Applications that target framework 2.0, 3.0 and 3.5 runs under the 2.0 CLR. The CLR is (except for a few breaking changes) backwards compatible, so an application targeting framework 1.1 can generally also run under the 2.0 CLR.

Each application pool in the IIS can only use one CLR version, so all applications in a pool has to either use ASP.NET 1.1 or ASP.NET 2.0. If you try to mix CLR versions in an application pool, the sites in the pool will stop working.