Hello, help needed

Question

I am a newly indoctrinated into C#, I wrote this code and its pulling an error (Use of unassigned local variable "words' ) in the line [for(int i = 0, i < words.Length; i++)], could you tell me where I went wrong 

 

Thanks

 

This is the code

 

static void Main(string[] args)

{

BinaryTree BT = new BinaryTree();

string line; // will be used to read the file, one line at a time

int count = 1;

string[] words;

try

{

count = 1;

StreamReader reader = new StreamReader("testfile.txt");//create input stream

line = reader.ReadLine();//get the next line

while (line != null)

words = line.Split(' ');

for (int i = 0; i <words.Length; i++)

BT.Insert(words[i], count);

line = reader.ReadLine();

reader.Close();

}

catch (IOException e)

{

Console.WriteLine("" + e.ToString());

BT.Display();

Console.ReadLine();