C# - Lamda with tempate

IDictionary<string, string> map =
                            str.Split('|').ToDictionary(s => s.Split('@')[0], s => s.Split('@')[1]);

The above statement works. But I would like to change it to template for IDictionary

public class CSVMap <TKey, TValue>
{
       public IDictionary<TKey, TValue>  func (string str)
      {
IDictionary<TKey, TValue> map =  str.Split('|').ToDictionary
                                           (ConvertValue<TKey>(s => s.Split('@')[0]),
                                            ConvertValue<TValue>(s => s.Split('@')[1]));

         }
        public static T ConvertValue<T>(string value)
        {
            return (T)Convert.ChangeType(value, typeof(T));
        }        
        and ConvertValue to cast the splitted strings to the type of TKey and TValue.

But I got below errors for the ConvertValue portions
error CS1660: Cannot convert lambda expression to type 'string' because it is not a delegate type
error CS1660: Cannot convert lambda expression to type 'string' because it is not a delegate type

I am not sure what the error mean or how to fix such problem.  Any help will be appreciated. Thanks
tommym121Asked:
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Ioannis ParaskevopoulosConnect With a Mentor Commented:
Hi,

The thing you have wrong is that you have s=> in the function parameters, while you should have it outside:

IDictionary<TKey, TValue> map =  str.Split('|').ToDictionary
                                           (s => ConvertValue<TKey>(s.Split('@')[0]), 
                                           s => ConvertValue<TValue>( s.Split('@')[1]));

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Giannis
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tommym121Author Commented:
Thanks
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