Fluent Assertions Documentation
FluentAssertions Assembly / FluentAssertions.Collections Namespace / GenericCollectionAssertions<TCollection,T,TAssertions> Class / OnlyContain Method
A predicate to match the items in the collection against.
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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    OnlyContain Method
    In This Topic
    Asserts that the collection only contains items that match a predicate.
    Syntax

    Parameters

    predicate
    A predicate to match the items in the collection against.
    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
    because
    predicate is a null reference (Nothing in Visual Basic).
    Permissions
    PermissionDescription
    because
    Example
    because
    Supported Frameworks
    because
    See Also