Update corlib_native_System_Number.cpp

[ghost]

Description

Fixes nanoframework/Home#260

How Has This Been Tested?

var i64 = Convert.ToInt64("01010101", 2);
long i64a = 1234567;
ulong i64b = 200;
Console.WriteLine("i64 = " + i64.ToString());
Console.WriteLine("i64a = " + i64a.ToString());
Console.WriteLine("i64a = " + i64a.ToString("X"));
Console.WriteLine("i64b = " + i64b.ToString("X"));

now returns

i64 = 85
i64a = 1234567
i64a = 12D687
i64b = C8

Types of changes

• Improvement (non-breaking change that improves a feature, code or algorithm)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[nfbot]

Hi @MikroBusNet,

I'm nanoFramework bot.
Thank you for your contribution!

A human will be reviewing it shortly. 😉