C#后端设置textbox背景颜色

在C#后端设置TextBox的背景颜色可以使用TextBox的BackColor属性。你可以将其设置为所需的颜色值。例如，如果你想将TextBox的背景颜色设置为红色，你可以使用以下代码：

TextBox1.BackColor = Color.Red;
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