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The MSBUILDCUSTOMBUILDEVENTWARNING environment variable, which previously allowed custom build events derived from BuildEventArgs, is no longer supported.
.NET 10 Preview 1
Users could set the MSBUILDCUSTOMBUILDEVENTWARNING environment variable to enable processing of custom build events.
The value of the MSBUILDCUSTOMBUILDEVENTWARNING environment variable is not respected anymore.
This is a behavioral change.
The escape hatch mechanism provided by the MSBUILDCUSTOMBUILDEVENTWARNING environment variable was a temporary workaround. For more information, see the original breaking change.
Use one of the following newly introduced, built-in events for extensibility instead of your custom derived build event:
Note: The author created this article with assistance from AI. Learn more
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