填空题 在线等

public static XmlSchemaElement GetTableSchema(string name)
  {
  XmlSchemaSet xsSet = new XmlSchemaSet();
  xsSet.Add("http://www.w3.org/2001/XMLSchema", __________);
  xsSet.Compile();
  _________ schema = null;
  foreach (XmlSchema xs in xsSet.Schemas())
  {
  schema = xs;
  }
  XmlQualifiedName qf = new _____________ (name, "http://www.w3.org/2001/XMLSchema");
  if (schema.Elements.Contains(qf))
  {
  return (XmlSchemaElement)schema.Elements[qf];
  }
  return null;
  }

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填空题？

恩 是啊 是一道测试题帮帮忙