Return the current solution directory, useful for tests

GetBuildDirectory.cs

public static string GetBuildDirectory()
{
	var solution = Environment.GetEnvironmentVariable("NCrunch.OriginalSolutionPath");
	if (!string.IsNullOrEmpty(solution))
		return Path.GetDirectoryName(solution);

	var teamCityLocation = Environment.GetEnvironmentVariable("teamcity.build.checkoutDir");
	if (!string.IsNullOrEmpty(teamCityLocation))
	{
		return teamCityLocation;
	}

	return Path.Combine(Environment.CurrentDirectory, "../../..");
}