temp file gets deleted, handle case

[BenjaminMichaelis]

Logs:

System. TypeInitializationException : The type initializer for
'IntelliTect.Multitool.RepositoryPaths' threw an exception.
System. IO. FileNotFoundException : Could not find file 'C: \U
\IntelliTect.MultiTool.BuildVariables.tmp'.

This exception was originally thrown at this call stack:
    Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(string, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, System.IO.FileOptions)
    Microsoft.Win32.SafeHandles.SafeFileHandle.Open(string, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, System.IO.FileOptions, long, System.IO.UnixFileMode?)
    System.IO.Strategies.OSFileStreamStrategy.OSFileStreamStrategy(string, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, System.IO.FileOptions, long, System.IO.UnixFileMode?)
    System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(string, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, System.IO.FileOptions, long, System.IO.UnixFileMode?)
    System.IO.StreamReader.ValidateArgsAndOpenPath(string, System.Text.Encoding, int)
    System.IO.File.ReadAllLines(string, System.Text.Encoding)
    IntelliTect.Multitool.RepositoryPaths.RepositoryPaths()

Possible repro steps:

• Project sat idle for a week or two without any work on it, project remained closed
• various Windows stuff happened that ultimately purged that temp file
• I open the project back up and run the tests, function doesn't work anymore

Investigate if the file isn't there as expected, handling that case.

[BenjaminMichaelis]

System.TypeInitializationException: 'The type initializer for 'IntelliTect.Multitool.RepositoryPaths' threw an exception.'
FileNotFoundException: Could not find file 'C:\Users\Test\AppData\Local\Temp\IntelliTect.MultiTool.BuildVariables.tmp'.

[System.TypeInitializationException user-unhandled]
IntelliTect.Multitool.dll!IntelliTect.Multitool.RepositoryPaths.BuildVariables.get()
IntelliTect.Multitool.dll!IntelliTect.Multitool.RepositoryPaths.GetDefaultRepoRoot()
ScriptTester.dll!ScriptTester.Services.ConfigurationService.LoadConfig() Line 14
	at D:\ScriptTester\ScriptTester\Services\ConfigurationService.cs(14)
ScriptTester.dll!ScriptTester.Program.Main(string[] args) Line 19
	at D:\ScriptTester\ScriptTester\Program.cs(19)
ScriptTester.dll!ScriptTester.Program.<Main>(string[] args)

System.TypeInitializationException
  HResult=0x80131534
  Message=The type initializer for 'IntelliTect.Multitool.RepositoryPaths' threw an exception.
  Source=IntelliTect.Multitool
  StackTrace:
   at IntelliTect.Multitool.RepositoryPaths.get_BuildVariables()
   at IntelliTect.Multitool.RepositoryPaths.GetDefaultRepoRoot()
   at ScriptTester.Services.ConfigurationService.LoadConfig() in D:\ScriptTester\ScriptTester\Services\ConfigurationService.cs:line 14
   at ScriptTester.Program.<Main>d__14.MoveNext() in D:\ScriptTester\ScriptTester\Program.cs:line 19

  This exception was originally thrown at this call stack:
    Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(string, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, System.IO.FileOptions)
    Microsoft.Win32.SafeHandles.SafeFileHandle.Open(string, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, System.IO.FileOptions, long, System.IO.UnixFileMode?)
    System.IO.Strategies.OSFileStreamStrategy.OSFileStreamStrategy(string, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, System.IO.FileOptions, long, System.IO.UnixFileMode?)
    System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(string, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, System.IO.FileOptions, long, System.IO.UnixFileMode?)
    System.IO.StreamReader.ValidateArgsAndOpenPath(string, System.Text.Encoding, int)
    System.IO.File.ReadAllLines(string, System.Text.Encoding)
    IntelliTect.Multitool.RepositoryPaths.RepositoryPaths()

Inner Exception 1:
FileNotFoundException: Could not find file 'C:\Users\Test\AppData\Local\Temp\IntelliTect.MultiTool.BuildVariables.tmp'.