LINQ Error IN ForEach

Question

Hi,

 

I am trying to combile multiple csv files to one, getting error as - in code

 

 'IEnumerable<string[]>' does not contain a definition for 'ForEach' and no extension method 'ForEach' accepting a first argument of type 'IEnumerable<string[]>' could be found (are you missing a using directive or an assembly reference?)

 

CODE - 

public static void CombineMisMatchedCsvFiles(string[] filePaths, string destinationFile, char splitter = ',')
        {

            HashSet<string> combinedheaders = new HashSet<string>();
            int i;
            // aggregate headers
            for (i = 0; i < filePaths.Length; i++)
            {
                string file = filePaths[i];
                combinedheaders.UnionWith(File.ReadLines(file).First().Split(splitter));
            }
            var hdict = combinedheaders.ToDictionary(y => y, y => new List<object>());

            string[] combinedHeadersArray = combinedheaders.ToArray();
            for (i = 0; i < filePaths.Length; i++)
            {
                var fileheaders = File.ReadLines(filePaths[i]).First().Split(splitter);
                var notfileheaders = combinedheaders.Except(fileheaders);

                File.ReadLines(filePaths[i]).Skip(1).Select(line => line.Split(splitter)).ForEach(spline =>
                {
                    for (int j = 0; j < fileheaders.Length; j++)
                    {
                        hdict[fileheaders[j]].Add(spline[j]);
                    }
                    foreach (string header in notfileheaders)
                    {
                        hdict[header].Add(null);
                    }

                });
            }