System.Xml.XmlWriter.LookupPrefix C# (CSharp) Method

        public abstract string LookupPrefix(string ns);

 public override void WriteXmlSchemaType(XmlWriter xw, string xmlns)
 {
     xw.WriteStartElement("complexType", XmlSchemaUtil.SCHEMA_NS);
     if (Name != null) xw.WriteAttributeString("name", Name);
     xw.WriteStartElement("sequence", XmlSchemaUtil.SCHEMA_NS);
     foreach (MemberDef member in Members)
     {
         xw.WriteStartElement("element", XmlSchemaUtil.SCHEMA_NS);
         xw.WriteAttributeString("name", member.Name);
         TypeDef td = ParentTypeSet.GetTypeDef(member.TypeName);
         if (td.IsSimpleType)
         {
             xw.WriteAttributeString("type", "xs:" + td.Name);
             if (member.IsRequired)
                 xw.WriteAttributeString("nillable", "false");
         }
         else
         {
             if (string.IsNullOrEmpty(xmlns))
                 xw.WriteAttributeString("type", td.Name);
             else
             {
                 string prf = xw.LookupPrefix(xmlns);
                 xw.WriteAttributeString("type", string.Format("{0}:{1}", prf, td.Name));
             }
         }
         xw.WriteAttributeString("minOccurs", member.IsRequired ? "1" : "0");
         xw.WriteAttributeString("maxOccurs", member.IsArray ? "unbounded" : "1");
         xw.WriteEndElement();
     }
     xw.WriteEndElement();
     xw.WriteEndElement();
 }