我怎样才能改变一个WPF文本框的背景色和前景色编程在C＃？

  textBox1.Background = Brushes.Blue;
textBox1.Foreground = Brushes.Yellow;
 

WPF前景和背景的类型是 System.Windows.Media.Brush 。您可以设置另一种颜色是这样的：

  //使用System.Windows.Media;

textBox1.Background = Brushes.White;
textBox1.Background =新的SolidColorBrush（Color.White）;
textBox1.Background =新的SolidColorBrush（Color.FromArgb（0xFF时，为0xFF，0，0）;
textBox1.Background = System.Windows.SystemColors.MenuHighlightBrush;
 

How can I change the background and foreground colors of a WPF Textbox programatically in c#?

textBox1.Background = Brushes.Blue;
textBox1.Foreground = Brushes.Yellow;

WPF Foreground and Background is of type System.Windows.Media.Brush. You can set another color like this:

// using System.Windows.Media;

textBox1.Background = Brushes.White;
textBox1.Background = new SolidColorBrush(Color.White);
textBox1.Background = new SolidColorBrush(Color.FromArgb(0xFF, 0xFF, 0, 0);
textBox1.Background = System.Windows.SystemColors.MenuHighlightBrush;