public void AsReadOnly_Throws_When_Source_Is_Null()
{
// ACT
Assert.Throws <ArgumentNullException>(() => DictionaryExtensions.AsReadOnly <string, object>(null));
}
public void AsReadOnly_Throws_When_Source_Is_Null()
{
// ACT
Assert.Throws <ArgumentNullException>(() => DictionaryExtensions.AsReadOnly <string, object>(null));
}