Question

Having this code:

using (BinaryWriter writer = new BinaryWriter(File.Open(ProjectPath, FileMode.Create)))
{
   //save something here
}

Do we need to close the BinaryWriter? If not, why?

Answer 1

So long as it’s all wrapped up in a using block then you don’t need to explicitly call Close.

The using block will ensure that the object is disposed, and the Close and Dispose methods are interchangeable on BinaryWriter. (The Close method just calls Dispose behind the scenes.)