如何将10位数字和2个字母组成的字符串格式化为yyyyMMddHHmm，然后将其格式化为另一个字符串？

myl.Add(AllNews[i].original_time);

myl是列表类型的字符串，而且original_time是字符串。

例如，现在original_time包含字符串："D140707T2149"现在，我想将此字符串转换为仅包含D和T的数字，并格式化为：yyyyMMddHHmm不包含秒。

然后最后构建一个像这样的字符串：

string results = myTime.ToString("hh:mm דווח במקור בתאריך : dd.MM.yy : שעה");

希伯来语单词保持不变，只是日期和时间每次都会改变。

这就是我试图做的：

IFormatProvider provider = CultureInfo.InvariantCulture;
DateTime myTime = DateTime.ParseExact(AllNews[i].original_time, "DyyMMddThhmm", provider);
string results = myTime.ToString("hh:mm דווח במקור בתאריך : dd.MM.yy : שעה");

但是我在网上遇到了异常：

DateTime myTime = DateTime.ParseExact(AllNews[i].original_time, "DyyMMddThhmm", provider);

字符串未被识别为有效的DateTime

然后，我首先尝试从字符串中删除Dand T：

AllNews[i].original_time = Regex.Replace(AllNews[i].original_time, "[^0-9]", ""); 
IFormatProvider provider = CultureInfo.InvariantCulture;
DateTime myTime = DateTime.ParseExact(AllNews[i].original_time, "yyyyMMddHHmm", provider);
string results = myTime.ToString("hh:mm דווח במקור בתאריך : dd.MM.yy : שעה");

但是还是和以前一样的例外：

System.FormatException was unhandled
  HResult=-2146233033
  Message=String was not recognized as a valid DateTime.
  Source=mscorlib
  StackTrace:
       at System.DateTimeParse.ParseExact(String s, String format, DateTimeFormatInfo dtfi, DateTimeStyles style)
       at System.DateTime.ParseExact(String s, String format, IFormatProvider provider)
       at ScrollLabelTest.ListsExtractions.listtostringlist(List`1 lnl, List`1 myl) in ListsExtractions.cs:line 345
       at ScrollLabelTest.ListsExtractions.Ext(String filename) in 
ListsExtractions.cs:line 220
       at ScrollLabelTest.Form1..ctor() in Form1.cs:line 127
       at ScrollLabelTest.Program.Main() in Program.cs:line 18
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: