C# 如何将动态对象设置为正确的类型

这是我移动滚动条的功能（我有水平滚动条和垂直滚动条）

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如果两种类型都是从类继承的，则只需执行一次强制转换：

private void moveTheScroll(object sbar, int scrollDiff)
{
    var scrollBar = sbar as ScrollBar;

    if(scrollBar != null)
    {
         int newScrollvalue = scrollBar.Value + scrollDiff;
         // do other works with scrollBar...
    }
}

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HScrollBar和VScrollBar都实现了接口或基类吗？是的，我已经用它实现了scrollbarsBetter，如果您更改参数的类型，您可以完全避免强制转换。

var v;
if(sbar is HScrollBar)
    v = (HScrollBar)sbar;
else if(sbar is VScrollBar)
    v = (VScrollBar)sbar;
v.Value = newValue;

private void moveTheScroll(object sbar, int scrollDiff)
{
    var scrollBar = sbar as ScrollBar;

    if(scrollBar != null)
    {
         int newScrollvalue = scrollBar.Value + scrollDiff;
         // do other works with scrollBar...
    }
}