Count the number of times a string appears within a string [duplicate]

Question

I simply have a string that looks something like this:

"7,true,NA,false:67,false,NA,false:5,false,NA,false:5,false,NA,false"

All I want to do is to count how many times the string "true" appears in that string. I'm feeling like the answer is something like String.CountAllTheTimesThisStringAppearsInThatString() but for some reason I just can't figure it out. Help?

Answer 1

Regex.Matches(input, "true").Count 

Answer 2

Probably not the most efficient, but think it's a neat way to do it.

class Program {     static void Main(string[] args)     {         Console.WriteLine(CountAllTheTimesThisStringAppearsInThatString("7,true,NA,false:67,false,NA,false:5,false,NA,false:5,false,NA,false", "true"));         Console.WriteLine(CountAllTheTimesThisStringAppearsInThatString("7,true,NA,false:67,false,NA,false:5,false,NA,false:5,false,NA,false", "false"));      }      static Int32 CountAllTheTimesThisStringAppearsInThatString(string orig, string find)     {         var s2 = orig.Replace(find,"");         return (orig.Length - s2.Length) / find.Length;     } }