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How to set comboBox in winform to the first Item as soon as the page starts

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Post time: 2020-2-10 22:00:01
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How to set comboBox in winform to the first Item as soon as the page is launched,
Cannot be set to the first item in the form's Load, as that will trigger SelectedIndexChanged.
I want to set the index to 0 when the page loads
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Post time: 2020-4-5 18:45:01
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comboBox.SelectIndex = 0
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Post time: 2020-4-5 20:45:01
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It is to write the following code in the Load event of Form:

if (comboBox.Item.Count> 0)
{
    comboBox.SelectedIndex = 0;
}
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Post time: 2020-4-6 02:45:01
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InitializeComponent
this.comboBox1.SelectedIndexChanged + = new System.EventHandler (this.comboBox1_SelectedIndexChanged); remove
statement:
private EventHandler selIndexChanged = null;
Add under winform load:
selIndexChanged + = new new System.EventHandler (this.comboBox1_SelectedIndexChanged);
comboBox.SelectIndex = 0;
comboBox1.SelectedIndexChanged + = selIndexChanged;
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Post time: 2020-4-6 14:00:02
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Positive solution upstairs.
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Post time: 2020-8-21 00:15:01
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Remove the event first, set the item, and restore the event
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