C# control the color of a character in a string

As far as my current knowledge is concerned, this effect can only be implemented in the RichTextBox control. The general idea of ​​implementation is to select a character or a certain segment of characters and then change the color.

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select a character

richTextBox2.SelectionStart = 0;
richTextBox2.SelectionLength = 1;
/*选中内容的起点，选中内容长度，上面两行代码的意思即选择了第一个字符*/

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change color

richTextBox2.SelectionColor = Color.Red;
//注意，先选中再变颜色

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Of course, for user experience, after changing the color, put the cursor at the end of the string.

ichTextBox2.SelectionStart = text.Length + 1;
richTextBox2.SelectionLength = 1;