How to convert float to system.Collection.generic.IEnumerabl

I suggest to convert first IEnumrable to generic list and then use this list to create a new Collection using the parametrized constructor of Collection class.

 

Eg:

Hey

As per enclosed image, you are adding a single float value that accepts a collection in its parameter.  As you are fetching average that returns single value.

 

Change from

Review.AddRange(temp);

 

to

Review.Add(temp); 

IEnumerable is an interface that defines one method GetEnumerator which returns an IEnumerator interface, this allows readonly access to a collection then collection that implements IEnumerable can be used with a for-each statement.

 

https://msdn.microsoft.com/en-us/library/system.collections.ienumerable(v=vs.110).aspx 

 

So it is list of elements, I am not sure how one float value will convert into IEnumerable.