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Fluent Assertions Documentation
FluentAssertions Assembly / FluentAssertions.Primitives Namespace / StringAssertions<TAssertions> Class / NotContain Method
The (fragment of a) string that the current string should not contain.
A formatted phrase as is supported by System.String.Format(System.String,System.Object[]) explaining why the assertion is needed. If the phrase does not start with the word because, it is prepended automatically.
Zero or more objects to format using the placeholders in because.
In This Topic
    NotContain Method (StringAssertions<TAssertions>)
    In This Topic
    Asserts that a string does not contain another (fragment of a) string.
    Syntax
    public AndConstraint<TAssertions> NotContain( 
   string unexpected,
   string because,
   params object[] becauseArgs
)

    Parameters

    unexpected
    The (fragment of a) string that the current string should not contain.
    because
    A formatted phrase as is supported by System.String.Format(System.String,System.Object[]) explaining why the assertion is needed. If the phrase does not start with the word because, it is prepended automatically.
    becauseArgs
    Zero or more objects to format using the placeholders in because.
    Exceptions
    ExceptionDescription
    System.ArgumentNullExceptionunexpected is a null reference (Nothing in Visual Basic).
    System.ArgumentExceptionunexpected is empty.
    Supported Frameworks

    .NET: net5.0, net5.0-windows, net6.0, net6.0-macos, net6.0-windows, net7.0, net7.0-macos, net7.0-windows, net8.0, net8.0-browser, net8.0-macos, net8.0-windows, net9.0, net9.0-browser, net9.0-macos, net9.0-windows, net10.0, net10.0-browser, net10.0-macos, net10.0-windows.

    .NET Standard: netstandard2.0, netstandard2.1.

    .NET Framework: net40, net403, net45, net451, net452, net46, net461, net462, net463, net47, net471, net472, net48, net481.

    See Also

    Reference

    StringAssertions<TAssertions> Class
    StringAssertions<TAssertions> Members

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