c# - Count numbers of \r\r in a string -

this question has answer here:

• how count of sub-string occurrences? [duplicate] 8 answers

i want count, how have \r\r in string variable.

for example:

string samplestring = "9zogl22n\r\r\nv4bv79gy\r\r\nkaz73ji8\r\r\nxw0w91qq\r\r\ns05jxqxx\r\r\nw08qsxh0\r\r\nuyggbaec\r\r\nu2izr6y6\r\r\n106iha5t\r"; 

the result in example 8.

you can write simple extension method that:

public static int linefeedcount(this string source) {      var chars = source.tochararray();       bool found = false;      int counter = 0;      int count = 0;      foreach(var ch in chars)      {          if (ch == '\r') found = true;          else found = false;           if (found) counter++;          else counter = 0;           if(counter != 0 && counter%2 == 0) count++;      }      return count; } 

then use it:

int count = inputstring.linefeedcount();