How to upload a .txt file as a .rtf file in C#?

How can I load a pre-existing .txt file as a .rtf file in my C# code if I 开发者_StackOverflowwant to display it on a richTextBox? I am running Visual Studios Windows Application.

Thank you very much.

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Try

string text = File.ReadAllText("filename.txt");
MyRichTextBox.Rtf = text; // oops, flying blind here

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You might also try

MyRichTextBox.LoadFile("filename.txt", RichTextBoxStreamType.PlainText); 

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edit: corrected to add RichTextBoxStreamType parameter.

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If the text file contains plain text and not text in rtf format, you can use:

MyRichTextBox.Text = File.ReadAllText("filename.txt");