If you cannot migrate, implement shadow-copying of the task DLL and enforce /m:1 in CI pipelines. For ephemeral build agents (Docker, Azure DevOps hosted agents), the problem often disappears due to clean state per build.
We’ll start with the least invasive solutions and move toward more permanent fixes. microsoft.bcl.build.tasks.dll is used by another process
Identifying what is holding the file hostage is half the battle. Here are the most frequent culprits: If you cannot migrate, implement shadow-copying of the