Passing the ValueStringBuilder to a method

As the ValueStringBuilder is ref struct you should be careful when passing the instance around. You should pass the reference and not the instance.

public void MyFunction()
{
    var stringBuilder = new ValueStringBuilder();
    stringBuilder.Append("Hello ");
    AppendMore(ref stringBuilder);
}

private void AppendMore(ref ValueStringBuilder builder)
{
    builder.Append("World");
}

This will print: Hello World

⚠️ The following code snippet will show how it does not work. If the instance is passed not via reference but via value then first allocations will happen and second the end result is not what one would expect.

public void MyFunction()
{
    var stringBuilder = new ValueStringBuilder();
    stringBuilder.Append("Hello ");
    AppendMore(stringBuilder);
}

private void AppendMore(ValueStringBuilder builder)
{
    builder.Append("World");
}

This will print: Hello .