public MatrixOperations(char symbol)
 {
     _fileIoOperations = new File_IO_Operations("path.txt");
     if (symbol == '\n')
     {
         symbol = ',';
     }
     _symbol = symbol;
 }
 public MatrixOperations(string path, char symbol)
 {
     _fileIoOperations = new File_IO_Operations(path);
     if (symbol == '\n')
     {
         symbol = ',';
     }
     _symbol = symbol;
 }