Fluent Assertions Documentation
FluentAssertions.Primitives Namespace / StringAssertions<TAssertions> Class / BeNullOrWhiteSpace Method
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.
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    BeNullOrWhiteSpace Method
    In This Topic
    Asserts that a string is either a null reference (Nothing in Visual Basic) or System.String.Empty or white space
    Syntax
    public AndConstraint<TAssertions> BeNullOrWhiteSpace( 
       string because,
       params object[] becauseArgs
    )

    Parameters

    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.
    Requirements

    Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

    See Also