# readIntoSync method

int readIntoSync (List<int> buffer, [ int start = 0, int end ])

Synchronously reads into an existing List<int> from the file. If `start` is present, the bytes will be filled into `buffer` from at index `start`, otherwise index 0. If `end` is present, the `end` - `start` bytes will be read into `buffer`, otherwise up to `buffer.length`. If `end` == `start` nothing happens.

Throws a FileSystemException if the operation fails.

## Implementation

    int readIntoSync(List<int> buffer, [int start = 0, int end]);