ClassicAssert.NotNull
ClassicAssert.NotNull and ClassicAssert.IsNotNull test that the specified object is non-null. The two forms are provided for compatibility with past versions of NUnit and NUnitLite.
ClassicAssert.NotNull(object anObject);
ClassicAssert.NotNull(object anObject, string message, params object[] params);
ClassicAssert.IsNotNull(object anObject);
ClassicAssert.IsNotNull(object anObject, string message, params object[] params);