Optional Method Arguments on byte array

Question

How would i make a default value for a byte array argument? The code below wont work...

public static void init(SomeByteArray[] = {1, 2, 3, 4}) {
    //Do Something
}

Is this possible?

Im doing this in .Net Micro Framework 4.1, if it makes any difference...

Answer 1

From MSDN:

A default value must be one of the following types of expressions:

• a constant expression;
• an expression of the form new ValType(), where ValType is a value type, such as an enum or a struct;
• an expression of the form default(ValType), where ValType is a value type.

So an array instance cannot be used as default value.

The best solution is probbaly two define two overloads as follows:

public static void Init()
{
    Init(new byte[] { 1, 2, 3, 4 });
}

public static void Init(byte[] data)
{
    ...

Answer 2

You can, but it needs to be assigned in the method, and the default value has to be null, like this:

public static void init(byte[] SomeByteArray = null)
{
    SomeByteArray = SomeByteArray ?? new byte[] {1, 2, 3, 4};
    //carry on with your method.
}