public void WriteXmlSchema7()
{
var ds = new DataSet();
DataTable dt = new DataTable("table");
dt.Columns.Add("col1");
dt.Columns.Add("col2");
ds.Tables.Add(dt);
dt.Rows.Add(new object[] { "foo", "bar" });
StringWriter sw = new StringWriter();
ds.WriteXmlSchema(sw);
Assert.True(sw.ToString().IndexOf("xmlns=\"\"") > 0);
}