title: Custom TypeConverter with variable StandardValues
body: <p>I have a datagridview with info about competitors. I  display each copmetitor's properties in PropertyGrid. I want some of those properties (e.g. Degree, City, Institute) to be dropboxes with values taken from database. For this purpose i can create a custom TypeConvertor like this one</p>
  
  <pre><code>class DegreeTypeConverter : StringConverter
  {
    static string[] _valueList = { "Bachelor", "Master", "Student" }; 
  
    public override bool GetStandardValuesSupported(
       ITypeDescriptorContext context)
    {
       return true;
    }
  
    public override bool GetStandardValuesExclusive(
       ITypeDescriptorContext context)
    {
       return true;
    }
  
  
    public override StandardValuesCollection GetStandardValues(
       ITypeDescriptorContext context)
    {
       return new StandardValuesCollection(_valueList);
    }
  }
  
  [TypeConverter(typeof(DegreeTypeConverter))]
    public string Degree
    {
       get { return _degree; }
       set { _degree = value; }
    }
  </code></pre>
  
  <p>But i want to get that valueList from database and i have 14 such properties so some universal converter would be much better than 14 converters with the only difference: valueList. Is it possible to create a TypeConverter with variable valueList (for example passed into TypeConverter as parameter in constructor)? Or maybe there's another way to have in PropertyGrid a dropbox with variable value list?
  Hope it was clear enough
  Thnx in advance</p>