var collection = new List<double>(new double[] { 10, 20, 11, 10, 20, 44 });
var info = collection.GroupBy(e => e).ToDictionary(e => e.Key, e => e.Count());

string[] arr1 = { "A", "b", "C," }
string[] arr2 = { "A", "b", "C," }

bool result = arr3.SequentialEqual(arr2)