The value in the ExitCode property depends on the kind of task run by the step:

• For a ProgramExecutionTask the ExitCode is the numeric exit code (return code) for the process run by the step.
• For a ScriptExecutionTask the ExitCode is the numeric or string result value set by the script, or Null if the script did not set a result.
• For a CustomTask, the Result depends on the task.
• For other tasks, the Result is meaningless and will be empty.