如何在 C# 中使用多个修饰键

我正在使用 keydown 事件来检测按下的按键，并有多个用于各种操作的组合键。

if (e.KeyCode == Keys.C && e.Modifiers == Keys.Control && e.Modifiers == Keys.Shift)
{
    //Do work
}
else if (e.KeyCode == Keys.V && e.Modifiers == Keys.Control)
{
    //Paste
}

For some reason the key combination in which I hit Ctrl + Shift + C is not working. I have re ordered them, and placed it at the top thinking it might be interference from the Ctrl + C, and even removed the Ctrl + C to see if it was causing a problem. It still does not work. I know it's probably something very simple, but can't quite grasp what it is. All of my 1 modifier + 1 key combination's work fine, as soon as I add a second modifier is when it no longer works.

if (e.KeyCode == Keys.C && e.Modifiers == (Keys.Control | Keys.Shift))
{
    //Do work
}
else if (e.KeyCode == Keys.V && e.Modifiers == Keys.Control)
{
    //Paste
}