Report a build problem to TeamCity.
void BuildProblem(string description, string identity = null)
||A human-readable plain text describing the build problem. By default, the description appears in the build status text and in the list of build's problems. The text is limited to 4000 symbols, and will be truncated if the limit is exceeded.
||A unique problem ID (optional). Different problems must have different identity, same problems - same identity, which should not change throughout builds if the same problem, for example, the same compilation error occurs. It must be a valid Java ID up to 60 characters. If omitted, the identity is calculated based on the description text.