How to transliterate on c# .net 4.0? -

i new programming. these code:

  public string thanglishtotamillist(char[] characters, int length) {         var dict1 = new dictionary<string, string>();          dict1.add("a", "\u0b85"); // அ         dict1.add("aa", "\u0b86"); // ஆ         dict1.add("a", "\u0b86"); // ஆ         dict1.add("i", "\u0b87"); // இ         dict1.add("ee", "\u0b88"); // ஈ         dict1.add("i", "\u0b88"); // ஈ         dict1.add("u", "\u0b89"); // உ         ...            list<string> list = new list<string>();         string[] array;         var valueofdictone = "";          (int = 0; < length; i++)         {                             try             {                 valueofdictone = dict1[characters[i].tostring()];                 list.add(valueofdictone);              }             catch             {                 list.add(characters[i].tostring());             }         }          array = list.toarray();         string result = string.join("", array);         return result;     } 

function parameter details:

char[] characters : array of characters (textbox.text.tochararray())

int length : length of array. (no of characters typed in text box)

my expected output should be:

if user types -> output should அ.

likewise:

a -> அ

aa -> ஆ

a -> ஆ ...

note aa & represent same ஆ

my problem: code replace 1 charecter (a -> அ), works fine.

but if type aa output அஅ

aa -> அஅ

but need correct output as

aa -> ஆ

i have added lines of codes this. did not work:

        ...         (int = 0; < length; i++)         {                             try             {                  if (string.equals(characters[i], "a") && !(string.equals(characters[i], "aa")))                 {                      //messagebox.show("a");                      valueofdictone = dict1[characters[i].tostring()];                     list.add(valueofdictone);                 }                 else if (string.equals(characters[i], "aa"))                 {                     //messagebox.show("aa");                      valueofdictone = dict1[characters[i].tostring()];                     list.add(valueofdictone);                 }              }             catch             {                 list.add(characters[i].tostring());             }         } 

...

please me correct code or please provide easy alternative ways transliterate.

thank you.

you can use simple parser/lexer tokenize input string. thanglishtotamillist function like:

... textreader r = new stringreader(characters); lexer l = new lexer(r, defs); while (l.next()) {   list.add(dict1[l.tokencontents]); } ... 

you can find example of simple parser/lexer here: poor man's "lexer" c#

it overkill problem, should job done.