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private void ChangeBadColor()//BAD字样修改为红色
{
richTextBox1.SelectAll();
richTextBox1.SelectionColor = Color.Black;
int BadIndex = 0;
while (BadIndex < richTextBox1.Text.Length && BadIndex > -1)
{
BadIndex = richTextBox1.Text.IndexOf("Bad", BadIndex + 1);
if (BadIndex > 0)
{
richTextBox1.Select(BadIndex, 3);
richTextBox1.SelectionColor = Color.Red;
}
}
richTextBox1.SelectionLength = 0;
richTextBox1.SelectionStart = 0;
}