want to pass credential to FME workbench from C# window application .

Hello @rajibtechlabs. Welcome to the FME Knowledge Center community! Sharing a few more details will help the FME community help you. Please reply to this thread and provide additional details including:

 

• The version of FME you are using, including build number and edition
• A small sample of your data, or screenshots of the data in the FME Data Inspector
• A description of your expected output, with screenshots if possible
• Your FME workspace
• Your FME translation log file
• Any other information that may be useful to share

Workbench uses the credentials from the current user. Sure you can impersonate another user in C#. You could also look at fmeobjects how to start a workspace. The question is what are you trying to achieve? If you want to access resources from workbench then you can use published parameters to pass the credentials.