extracting specific format elements from the list in c#

Question

how to separate (numeric elements and alphabetic elements) with (alphanumeric elements and elements with brackets like [Constant 0.001]) from a list into two separate lists.

like we have elements in

list<string> abc={'123','11','abcc','abdd','abcd11','abcd12',[abcd]}

after seprating elements in two lists..

list<string> abc1={'123','11','abcc','abdd'}  
list<string> abc2={'abcd11','abcd12',[abcd]}

Answer 1

var abc = new List<string> { "abc", "123", "abd12" };

var alphaXorNumerical = abc.Where(str => str.All(Char.IsDigit) ||
                                         str.All(Char.IsLetter));

var others = abc.Except(alphaXorNumerical);

If you also want to check for whitespace, use this instead:

var alphaXorNumerical = abc
          .Where(str => str.All(Char.IsDigit) ||
                        str.All(ch => Char.IsLetter(ch) || Char.IsWhiteSpace(ch)));