Fluent Assertions Documentation
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    Guids
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    The assertions you can do on Guids are simple. You can assert their equality to another Guid, or you can assert that a Guid is empty.

    C#
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    Guid theGuid = Guid.NewGuid();
    Guid sameGuid = theGuid;
    Guid otherGuid = Guid.NewGuid();
    
    theGuid.Should().Be(sameGuid);
    theGuid.Should().NotBe(otherGuid);
    theGuid.Should().NotBeEmpty();
    
    Guid.Empty.Should().BeEmpty();
    
    theGuid.Should().Be("11111111-aaaa-bbbb-cccc-999999999999");
    theGuid.Should().NotBe("00000000-0000-0000-0000-000000000001");