https://keijiban.umayadia.com/ThreadDetail.aspx?ThreadId=9915#CommentId16484
投稿者 shu  (社会人) 投稿日時 2010/12/16 21:59:50
Dim dtTmp as date

dtTmp = new Date(2010, 12, 15)
Console.Writeline(dtTmp.ToString("yyyy/MM/dd"))

dtTmp = dtTmp.AddDays(1)
Console.Writeline(dtTmp.ToString("yyyy/MM/dd"))

dtTmp = new Date(2010, 12, 31)
Console.Writeline(dtTmp.ToString("yyyy/MM/dd"))

dtTmp = dtTmp.AddDays(1)
Console.Writeline(dtTmp.ToString("yyyy/MM/dd"))

こんな感じですか？
0