Argument type object is not assignable to System.Func

Question

I am getting an error message that makes absolutely no sense to me!! ``` public class ChartInitializerBase { #region Constructors public ChartInitializerBase(Func<object> retrieveData) { var Data = retrieveData; } #endregion } ``` The idea of the constructor above is that I can pass different methods in to obtain data For example, if I am displaying books I want to say ``` var intiialiser = new ChartInitializerBase(GetBooks(1234, 231)) ``` If I am getting CDs I want to say ``` var intiialiser = new ChartInitializerBase(GetCDs(1234, 231, 34)) ``` The parameters above are different, but both GetCDs and GetBooks would return a single object In my exact situation I have ``` var chart = new DailyConsumptionChart( dataProvider.GetDataForDailyConsumptionChart("1", EUtilityGroup.Electricity, 321, 157, Convert.ToDateTime("01/01/2010"), Convert.ToDateTime("01/01/2010 23:30"), false)); public class ProfileDataDashboardReportsDataProvider { #region Methods public object GetDataForDailyConsumption…

Accepted Answer

Try to pass lambda to your constructor, instead of the result of the method execution, like in the code example below.

```
var initialiser = new ChartInitializerBase(() => GetBooks(1234, 231));
```

Here you simply pass lambda with one statement - call to GetBooks method

Your constructor should be like

```
public ChartInitializerBase(Func<object> retrieveData) 
{ 
      var Data = retrieveData(); //here the method GetBooks will be called and data returned
}
```

Argument type object is not assignable to System.Func<object> error

Solution

Problem