public void Insert(int index, ValueConverter valueConverter)
 {
     list.Insert(index, valueConverter.ValueType.Name, valueConverter);
 }
 public void Remove(ValueConverter valueConverter)
 {
     list.Remove(valueConverter.ValueType.Name);
 }
 public void Add(ValueConverter valueConverter)
 {
     list.Add(valueConverter.ValueType.Name, valueConverter);
 }