MSBuild Exec task: using quotes in WorkingDirectory does not work

For a general applicability i tried to specify the WorkingDirectory attribute in a qotted manner: <WorkingDir>&quot;$(SolutionRoot)\EsriDE.Commons\tools\Esri...

For a general applicability i tried to specify the WorkingDirectory attribute in a qotted manner:





<WorkingDir>&quot;$(SolutionRoot)\EsriDE.Commons\tools\EsriDE\&quot;</WorkingDir>

or





<DoubleQuotes>%22</DoubleQuotes>

<WorkingDir>$(DoubleQuotes)$(SolutionRoot)\EsriDE.Commons\tools\EsriDE\$(DoubleQuotes)</WorkingDir>

The Exec task self is





<Exec

  WorkingDirectory="$(WorkingDir)"

  Command="$(ExtractComCategories) $(InputDirectoryArg) $(FilterArg) $(SeparationArg) $(OutputDirectoryArg) $(OutputFileArg) $(OutputFormatArg)" />

Every variant throws during building the exception MSB6003 (The directory name is invalid):





"E:\builds\RXXXXX_Sourcecode\APF_Evaluation\BuildType\..\Sources\EsriDE.Commons\tools\EsriDE\EsriDE.Utilities.Build.Com.ComCategoryExtractor.exe"

-inDir:"E:\builds\RXXXXX_Sourcecode\APF_Evaluation\Binaries\Debug" -filter:* -separation:AssemblySeparated

-outDir:"E:\builds\RXXXXX_Sourcecode\APF_Evaluation\Binaries\Debug" -outFile:AllInOneReg -outFormat:RegistryFile

E:\builds\RXXXXX_Sourcecode\APF_Evaluation\BuildType\TFSBuild.proj(70,3):

error MSB6003: The specified task executable could not be run.



The directory name is invalid

I have no idea for a solution. Now the WorkingDirectory is not quoted.