Anagram - start to read more Lambda expression code in C#/

Anagram5.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
class Solution 
{
        private static int Find_AnagramCount(string Input)
        {
            int _returnResult = 0;
            List<char> first_HalfList = new List<char>(Input.Substring(0, Input.Length / 2).ToCharArray().Select(g=>Convert.ToChar(g))) ;
            List<char> Second_HalfList = new List<char>(Input.Substring(Input.Length / 2).ToCharArray().Select(g => Convert.ToChar(g)));
            foreach (char currentChar in Second_HalfList)
            {
                first_HalfList.Remove(currentChar);
            }
            if (first_HalfList != null && first_HalfList.Count > 1)
                _returnResult = first_HalfList.Count;
            return _returnResult;
        }
        static void Main(string[] args)
        {
            int t = Convert.ToInt32(Console.ReadLine().Trim());
            int[] results = new int[t];
            for (int i = 0; i < t; i++)
            {
                string console_input = Console.ReadLine().Trim();
                if (console_input.Length % 2 == 0)
                {
                    results[i] = Find_AnagramCount(console_input);
                }
                else
                    results[i] = -1;
            }
            for (int i = 0; i < t; i++)
                Console.WriteLine(results[i]);
        }
}