Builder pattern question

I have a Builder pattern for the options and since

domainName

domainName

and

domainContainer

domainContainer

are mandatory fields, I wonder if it's actually better to create

WithXYZ

WithXYZ

methods for each one of them and have a

string.IsNullOrEmpty

string.IsNullOrEmpty

check in

Build()

Build()

in opposed to setting them in the ctor