
F:\commandline-2.7.82-Dev\issues\bin\Debug\net472>groups 

Unhandled Exception: System.InvalidOperationException: Operation is not valid du
e to the current state of the object.
   at CommandLine.Text.SentenceBuilder.DefaultSentenceBuilder.<>c.<get_FormatErr
or>b__13_0(Error error) in F:\commandline-2.7.82-Dev\commandline\src\CommandLine
\Text\SentenceBuilder.cs:line 162
   at CommandLine.Text.HelpText.<RenderParsingErrorsTextAsLines>d__75`1.MoveNext
() in F:\commandline-2.7.82-Dev\commandline\src\CommandLine\Text\HelpText.cs:lin
e 667
   at CSharpx.EnumerableExtensions.ForEach[T](IEnumerable`1 source, Action`1 act
ion) in F:\commandline-2.7.82-Dev\commandline\src\CommandLine\Infrastructure\CSh
arpx\EnumerableExtensions.cs:line 262
   at CommandLine.Text.HelpText.AddPreOptionsLines(IEnumerable`1 lines) in F:\co
mmandline-2.7.82-Dev\commandline\src\CommandLine\Text\HelpText.cs:line 515
   at CommandLine.Text.HelpText.DefaultParsingErrorsHandler[T](ParserResult`1 pa
rserResult, HelpText current) in F:\commandline-2.7.82-Dev\commandline\src\Comma
ndLine\Text\HelpText.cs:line 470
   at CommandLine.Text.HelpText.<>c__DisplayClass61_0`1.<AutoBuild>b__0(HelpText
 current) in F:\commandline-2.7.82-Dev\commandline\src\CommandLine\Text\HelpText
.cs:line 433
   at CommandLine.Text.HelpText.AutoBuild[T](ParserResult`1 parserResult, Func`2
 onError, Func`2 onExample, Boolean verbsIndex, Int32 maxDisplayWidth) in F:\com
mandline-2.7.82-Dev\commandline\src\CommandLine\Text\HelpText.cs:line 353
   at CommandLine.Text.HelpText.AutoBuild[T](ParserResult`1 parserResult, Func`2
 onError, Int32 maxDisplayWidth) in F:\commandline-2.7.82-Dev\commandline\src\Co
mmandLine\Text\HelpText.cs:line 430
   at CommandLine.Text.HelpText.AutoBuild[T](ParserResult`1 parserResult, Int32
maxDisplayWidth) in F:\commandline-2.7.82-Dev\commandline\src\CommandLine\Text\H
elpText.cs:line 404
   at CommandLine.Parser.<>c__DisplayClass17_0`1.<DisplayHelp>b__1(IEnumerable`1
 _, TextWriter writer) in F:\commandline-2.7.82-Dev\commandline\src\CommandLine\
Parser.cs:line 206
   at CSharpx.MaybeExtensions.Do[T1,T2](Maybe`1 maybe, Action`2 action) in F:\co
mmandline-2.7.82-Dev\commandline\src\CommandLine\Infrastructure\CSharpx\Maybe.cs
:line 311
   at CommandLine.Parser.<>c__DisplayClass17_0`1.<DisplayHelp>b__0(IEnumerable`1
 errors) in F:\commandline-2.7.82-Dev\commandline\src\CommandLine\Parser.cs:line
 205
   at CommandLine.ParserResultExtensions.WithNotParsed[T](ParserResult`1 result,
 Action`1 action) in F:\commandline-2.7.82-Dev\commandline\src\CommandLine\Parse
rResultExtensions.cs:line 64
   at CommandLine.Parser.DisplayHelp[T](ParserResult`1 parserResult, TextWriter
helpWriter, Int32 maxDisplayWidth) in F:\commandline-2.7.82-Dev\commandline\src\
CommandLine\Parser.cs:line 203
   at CommandLine.Parser.MakeParserResult[T](ParserResult`1 parserResult, Parser
Settings settings) in F:\commandline-2.7.82-Dev\commandline\src\CommandLine\Pars
er.cs:line 195
   at CommandLine.Parser.ParseArguments[T](IEnumerable`1 args) in F:\commandline
-2.7.82-Dev\commandline\src\CommandLine\Parser.cs:line 94
   at Class1.Main1(String[] args) in F:\commandline-2.7.82-Dev\issues\Class1.cs:
line 19
   at groups.Program.Main(String[] args) in F:\commandline-2.7.82-Dev\issues\Pro
gram.cs:line 14
