How to find empty bytes array

How to find out is bytes array has any data or it 开发者_运维问答is newly created bytes array?

var Buffer = new byte[1000];
//How to find out is Buffer is empty or not?

I assume by 'empty' you mean containing default values for every byte element, if this isn't what you mean, look at @sehe's answer.

How about using LINQ to check whether all elements have the default value for the type:

var Empty = Buffer.All(B => B == default(Byte));

A byte is a valuetype, it cannot be null;

Creating an array immediately initializes the elements to the default value for the element type.

This means, empty cells can't exist, let alone be detected.

If you must:

1. use nullable types

   var Buffer = new byte?[1000];

2. use Array.Resize when capacity changes. However, you could soon be in a situation where just using a System.Collections.Generic.List would be much more efficient

In addition to the answers given

            var buffer = new byte[1000];
            var bFree = true;
            foreach (var b in buffer)
            {
                if (b == default(byte)) continue;
                bFree = false;
                break;
            }