Assert.False - samuelneff/docs GitHub Wiki
Assert.False and Assert.IsFalse test that the specified condition is false. The two forms are provided for compatibility with past versions of NUnit and NUnitLite.
Assert.False( bool condition );
Assert.False( bool condition, string message, params object[] parms );
Assert.IsFalse( bool condition );
Assert.IsFalse( bool condition, string message, params object[] parms );
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