[RESOLVED] Object reference not set to an instance of an object"

Code:

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                StreamReader sr1 = new StreamReader(name1);
                Dictionary<string, string> dictmap = new Dictionary<string, string>();
                Dictionary<int, string>[] dictped = new Dictionary<int, string>[2];
                int k = 0;
                while (!sr1.EndOfStream)
                {
                    string line = sr1.ReadLine();
                    string[] fields = line.Split('\t');
                    dictmap.Add(fields[1], line);
                    dictped[0].Add(k, fields[1]); // error here while step into
                    k += 1;
                }

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But I got an error "Object reference not set to an instance of an object".
Thanks for help.
Resloved!