input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
-webkit-appearance: none;
margin: 0;
}
/* hide arrows
Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
-webkit-appearance: none !important;
margin: 0 !important;
}
/* Firefox */
input[type=number] {
-moz-appearance: textfield !important;
}input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
-webkit-appearance: none;
}numericUpDown1.Controls.RemoveAt(0);