public AndSpecification(Specification <T> spec2, Specification <T> spec1)
{
_spec2 = spec2;
_spec1 = spec1;
}
public EqualSpecification(Specification <T> spec1, Specification <T> spec2, bool equality)
{
this._spec1 = spec1;
this._spec2 = spec2;
this._equality = equality;
}