如何以正确的字体呈现unicode字符？(C#/的WinForms)

System.Numerics.Vector4 FontColor = new System.Numerics.Vector4(255, 255, 255, 255); // 假设将字体颜色设置为纯白色
MaskedTextBox maskedTextBox1 = new MaskedTextBox
{
    Mask = "(999) 999-9999",
    Controls = {new CheckBox { Dock = DockStyle.Left }},
    Margin = new Padding(2),
    ForeColor = FontColor,
};
maskedTextBox1.PreviewTextInput += (s, e) =>
{
    string input = e.Text;
    char c = char.IsDigit(input[0]) ? input[0] : MaskedText[0];
    MaskedText = input;
    UpdateForm();
};
maskedTextBox1.TextChanged += (s, e) =>
{
    MaskedText = maskedTextBox1.Text;
    UpdateForm();
};
UpdateForm();