Generic List<T> as IEnumerable<object>
- by Avi
I'm trying to do cast a List to an IEnumerable, so I can verify that different lists are not null or empty:
Suppose myList is a List < T . Then in the caller code I wanted:
Validator.VerifyNotNullOrEmpty(myList as IEnumerable<object>,
@"myList",
@"ClassName.MethodName");
The valdiating code would be:
public static void VerifyNotNullOrEmpty(IEnumerable<object> theIEnumerable,
string theIEnumerableName,
string theVerifyingPosition)
{
string errMsg = theVerifyingPosition + " " + theIEnumerableName;
if (theIEnumerable == null)
{
errMsg += @" is null";
Debug.Assert(false);
throw new ApplicationException(errMsg);
}
else if (theIEnumerable.Count() == 0)
{
errMsg += @" is empty";
Debug.Assert(false);
throw new ApplicationException(errMsg);
}
}
However, this doens't work. It compiles, but theIEnumerable is null! Why?
