public void Linq90()
{
string[] words = { "cherry", "apple", "blueberry" };
double averageLength = words.Average(w => w.Length);
Console.WriteLine("The average word length is {0} characters.", averageLength);
}
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prog.cs(1,13): error CS0116: A namespace can only contain types and namespace declarations
Compilation failed: 1 error(s), 0 warnings