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How to determine the Wednesday's in a given date range

View gist:4015997
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void Main()
{
var start = new DateTime(2012, 10, 1);
var end = new DateTime(2012, 10, 31);
 
var days = from d in start.UpTo(end)
where d.DayOfWeek == DayOfWeek.Wednesday
select d;
 
days.Dump();
}
 
public static class Ext
{
public static IEnumerable<DateTime> UpTo(this DateTime start, DateTime end)
{
return start.Generate(x => x.AddDays(1)).TakeWhile(x => x <= end);
}
 
public static IEnumerable<T> Generate<T>(this T start, Func<T, T> getNext)
{
var current = start;
while(true)
{
yield return current;
current = getNext(current);
}
}
}
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