using System;

using System.Linq;

public class Program {

  public static (string result, int left, int right) MyTrim(string value, params string[] trim) {

    if (string.IsNullOrEmpty(value) || trim is null || trim.Length == 0)

      return (value, 0, 0);

​

    int trimmedLeft = 0;

    int trimmedRight = 0;  

    var span = value.AsSpan();

​

    for (bool keep = true; keep; ) {

      keep = false;

​

      foreach (var item in trim)

        if (!string.IsNullOrEmpty(item) && span.StartsWith(item)) {

          trimmedLeft += item.Length;   

          span = span.Slice(item.Length);

          keep = true;

​

          break;

        }

    }

​

    for (bool keep = true; keep; ) {

      keep = false;

​

      foreach (var item in trim)

        if (!string.IsNullOrEmpty(item) && span.EndsWith(item)) {

          trimmedRight += item.Length;   

          span = span.Slice(0, span.Length - item.Length);

          keep = true;

​

          break;

        }

    }

​

    return (span.ToString(), trimmedLeft, trimmedRight);

  } 

  // Instead of returning tuple, let's return custom object 

  public class MyTrimResult {

      public MyTrimResult(string result, int left, int right) {

          Result = result;

          Left = left;

          Right = right;

      }

      public string Result { get; private set; }

      public int Left { get; private set; }

      public int Right { get; private set; }

  }

  // (Very) Old style implementation: no tuples, no spans   

  public static MyTrimResult MyTrimOld(string value, params string[] trim) {

    if (string.IsNullOrEmpty(value) || trim is null || trim.Length == 0)

      return new MyTrimResult(value, 0, 0);

​

    int trimmedLeft = 0;

    int trimmedRight = 0;  

​

    for (bool keep = true; keep; ) {

      keep = false;

​

      foreach (var item in trim)

        if (!string.IsNullOrEmpty(item) && value.StartsWith(item)) {

          trimmedLeft += item.Length;   

          value = value.Substring(item.Length);

          keep = true;

​

          break;

        }

    }

​

    for (bool keep = true; keep; ) {

      keep = false;

​

      foreach (var item in trim)

        if (!string.IsNullOrEmpty(item) && value.EndsWith(item)) {

          trimmedRight += item.Length;   

          value = value.Substring(0, value.Length - item.Length);

          keep = true;

​

          break;

        }

    }

​

    return new MyTrimResult(value, trimmedLeft, trimmedRight);

  }     

  public static void Main() {

    string[] tests = new string[] {

      "///g, hhh/ , test",

      "//*g, hhh/ , test ", 

      "#/test",

      "hello  //",

    };

    var report = string.Join(Environment.NewLine, tests

        .Select(test => (test, result : MyTrim(test, " ", "#", "\t", "//", "/*", "*/")))                         

        .Select(pair => $"{pair.test,30} ===> {pair.result.result} (left: {pair.result.left}; right: {pair.result.right}) "));  

    Console.WriteLine(report);

    Console.WriteLine();  

    var reportOld = string.Join(Environment.NewLine, tests

        .Select(test => (test, result : MyTrimOld(test, " ", "#", "\t", "//", "/*", "*/")))                      

        .Select(pair => $"{pair.test,30} ===> {pair.result.Result} (left: {pair.result.Left}; right: {pair.result.Right}) "));  

    Console.WriteLine(reportOld);  

  }

}