Errors

The task validates the configuration and the files before it writes anything. When it finds a problem, it reports an MSBuild error and the build stops: the generated file is not written.

MFECG0001: Embedded constants namespace is invalid

The namespace is not a valid C# namespace: each part between the dots must be an identifier, and C# keywords such as class or namespace are not accepted.

Fix: set EmbeddedConstantsNamespace to a valid namespace. When the property is not set, the namespace is the root namespace of the project, or its name when the root namespace is empty: check these values.

MFECG0002: Embedded constants class name is invalid

EmbeddedConstantsClassName is not a valid C# identifier, or is a C# keyword.

Fix: use a valid identifier, such as EmbeddedFiles.

MFECG0003: Embedded constant kind is missing

An EmbeddedConstant item has no Kind metadata.

Fix: add Kind="Text", Kind="Binary" or Kind="Both" to the item.

MFECG0004: Embedded constant kind is invalid

The Kind metadata is not Text, Binary or Both.

Fix: use one of these values. The case does not matter.

MFECG0005: Embedded constant member name is duplicated

Several files produce the same member name. The message lists the files involved. This happens when two files have the same Name metadata, or when files with the same name are not separated by their relative path, for instance because one of them is outside the project directory. See Member names.

Fix: set the Name metadata on all but one of the files.

MFECG0006: Embedded constant file cannot be read

A file listed in EmbeddedConstant does not exist or cannot be read. The message gives the reason.

Fix: check the path in the Include attribute; a relative path is relative to the project directory.

MFECG0007: Embedded constant text file is not valid UTF-8

A file with Kind="Text" or Kind="Both" contains bytes that are not valid UTF-8, for instance a file saved in another encoding, or a binary file.

Fix: save the file as UTF-8, or use Kind="Binary" for a file that is not text.

MFECG0008: Embedded constant text file is too large

A text file is larger than 1 MiB, the maximum for a const string.

Fix: split the file, or use Kind="Binary" and decode the bytes at run time.

MFECG0009: Embedded constants visibility is invalid

EmbeddedConstantsClassVisibility or EmbeddedConstantsMemberVisibility is not internal or public.

Fix: use internal or public, in lowercase.

MFECG0010: Embedded constant member name is the same as the generated class name

A generated member would have the name of the class, which C# does not allow. For instance, the class is named ConfigText and a file config.txt has Kind="Text".

Fix: set the Name metadata on the file, or change EmbeddedConstantsClassName.

MFECG0011: The embedded constants could not be computed or written

An unexpected error occurred, or the generated file could not be written (a read-only folder, a file locked by another process...). The message gives the reason.

Fix: check that EmbeddedConstantsOutputPath points to a folder the build can write to.