If you are using SolrSharp, it does not support negative queries.
You need to change QueryParameter.cs (Create a new parameter)
private bool _negativeQuery = false;
public QueryParameter(string field, string value, ParameterJoin parameterJoin = ParameterJoin.AND, bool negativeQuery = false)
{
this._field = field;
this._value = value.Trim();
this._parameterJoin = parameterJoin;
this._negativeQuery = negativeQuery;
}
public bool NegativeQuery
{
get { return _negativeQuery; }
set { _negativeQuery = value; }
}
And in QueryParameterCollection.cs class, the ToString() override, looks if the Negative parameter is true
arQ[x] = (qp.NegativeQuery ? "-(" : "(") + qp.ToString() + ")" + (qp.Boost != 1 ? "^" + qp.Boost.ToString() : "");
When you call the parameter creator, if it's a negative value. Simple change the propertie
List<QueryParameter> QueryParameters = new List<QueryParameter>();
QueryParameters.Add(new QueryParameter("PartnerList", "[* TO *]", ParameterJoin.AND, true));