private void Form1_Load(object sender, EventArgs e)
{
// Set format to custom date and time
dateTimePicker1.Format = DateTimePickerFormat.Custom;
dateTimePicker1.CustomFormat = "dd-MM-yyyy hh:mm tt";
}
set the datepicker control format property set to use a custom format:
DateTimePicker1.Format = DateTimePickerFormat.Custom
after this by using Customformat you can set your own format. like below
DateTimePicker1.CustomFormat = "dd-MM-yyyy"
public void SetMyCustomFormat()
{
// Set the Format type and the CustomFormat string.
dateTimePicker1.Format = DateTimePickerFormat.Custom;
dateTimePicker1.CustomFormat = "MMMM dd, yyyy - dddd";
}