c# - How to check if file contains strings, which will double repeat sign? -

i check if file containing strings, separated # contains double repeat sign. example: have file this:

1234#224859#123567 

i reading file , putting strings separated # array. find strings have digit repeated next each other (in case 224859) , return position of first digit repeats in string?

this have far:

    arraylist list = new arraylist();     openfiledialog openfile1 = new openfiledialog();          int size = -1;         dialogresult dr = openfile1.showdialog();         string file = openfile1.filename;         try         {             string text = file.readalltext(file);             size = text.length;             string temp = "";              (int = 0; < text.length; i++)             {                 if (text[i] != '#')                 {                     temp += text[i].tostring();                 }                 else                 {                     list.add(temp);                     temp = "";                 }             }         }         catch (ioexception)         {         }         string all_values = "";         foreach (object obj in list)         {             all_values += obj.tostring() + " => ";              console.writeline(" => ", obj);         }         textbox1.text = (all_values); 

this more procedural approach sriram's, main benefit remembering results in order use them later in program.

basically, string split based on # delimiter, returns string[] holds each number inside. then, each string iterate through characters , check see if current character @ i matches next character @ i + 1. if so, earliest appearance of duplicate digit @ i, i remembered , break out of loop processes chars.

since int non-nullable type, decided use -1 indicate match not found in string.

dictionary<string, int> results = new dictionary<string, int>(); string text = "1234#224859#123567#11#4322#43#155"; string[] list = text.split('#'); foreach (string s in list) {     int tempresult = -1;     (int = 0; < s.length - 1; i++)     {         if(s.elementat(i) == s.elementat(i + 1))         {             tempresult = i;             break;         }     }     results.add(s, tempresult); }  foreach (keyvaluepair<string, int> pair in results)  {     console.writeline(pair.key + ": " + pair.value); } 

output:

1234: -1

224859: 0

123567: -1

11: 0

4322: 2

43: -1

155: 1