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i have the following code in WPA, and i am trying to convert it to WPF. I tried Keydown instead of Keypress and changed, for example, (e.keyChar == '-') to (e.key == e.Subtract): its not working the same I cant find the equal sign within e.key first code: public partial class Form1 : Form { public Form1() { InitializeComponent(); foreach (TextBox tb in this.Controls.OfType<TextBox>()) { tb.Enter += textBox_Enter; } } void textBox_Enter(object sender, EventArgs e) { focusedTextbox = (TextBox)sender; } private void Form1_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == '+') { operand1.Real = getOperand.Real; operand1.Imag = getOperand.Imag; flag1 = 1; e.Handled = true; } else if (e.KeyChar == '-') { if (focusedTextbox != null) { if (focusedTextbox.Text == "") { e.Handled = false; } else { e.Handled = true; operand1.Real = getOperand.Real; operand1.Imag = getOperand.Imag; flag1 = 2; } } } else if (e.KeyChar == '*') { operand1.Real = getOperand.Real; operand1.Imag = getOperand.Imag; flag1 = 3; e.Handled = true; } else if (e.KeyChar == '/') { operand1.Real = getOperand.Real; operand1.Imag = getOperand.Imag; flag1 = 4; e.Handled = true; } else if (e.KeyChar == '=') { e.Handled = true; operand2.Real = getOperand.Real; operand2.Imag = getOperand.Imag; switch

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