Question

I have Rich Textbox and it’s named textBox1

When I try this:

                    textBox1.AppendText(value);
                    textBox1.SelectionColor = Color.Red;

the Red is underlined and errored:

Error 2 'string' does not contain a definition for 'Red' and no extension method 'Red' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?) Form1.cs 73 57

Answer 1

Does your form have a field or property named Color whose type is string? If it does, then the “Color” in Color.Red refers to that field or property instead of the System.Drawing.Color type.

You can disambiguate the reference by specifying the System.Drawing namespace:

textBox1.SelectionColor = System.Drawing.Color.Red;