public string check_paperversion(string identification)
        {
            // Arrange
            CompanyLocalUnitNumber companyLocalUnitNumber = new CompanyLocalUnitNumber(identification);

            // Act

            // Assert
            Assert.That(companyLocalUnitNumber.IsValid, Is.True);
            Assert.That(companyLocalUnitNumber.ElectronicVersion, Is.Not.Null);
            return(companyLocalUnitNumber.PaperVersion);
        }
        public void companyLocalUnitNumber_is_valid(string identification)
        {
            // Arrange
            CompanyLocalUnitNumber companyLocalUnitNumber = new CompanyLocalUnitNumber(identification);

            // Act

            // Assert
            Assert.That(companyLocalUnitNumber.IsValid, Is.True);
            Assert.That(companyLocalUnitNumber.ElectronicVersion, Is.Not.Null);
            Assert.That(companyLocalUnitNumber.PaperVersion, Is.Not.Null);
        }