相关疑难解决方法(0)

我想要一个干净的方法来增加StringBuilder()的大小,因为本地代码需要填充,下面的回调方法看起来很干净,但不知怎的,我们得到缓冲区的副本而不是实际的缓冲区 - 我感兴趣的是解释和解决方案(最好坚持回调类型分配,因为只要它可以工作就会很好和干净).

using System;
using System.Runtime.InteropServices;
using System.Text;

namespace csharpapp
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            var buffer = new StringBuilder(12);
            // straightforward, we can write to the buffer but unfortunately
            // cannot adjust its size to whatever is required
            Native.works(buffer, buffer.Capacity); 
            Console.WriteLine(buffer);

            // try to allocate the size of the buffer in a callback - but now
            // it seems only a copy of the buffer is passed to native code
            Native.foo(size => …