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Home/ Questions/Q 7431749
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Editorial Team
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Editorial Team
Asked: May 29, 20262026-05-29T09:20:38+00:00 2026-05-29T09:20:38+00:00

I’ve been looking and googling around for 4h to find a solution for my

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I’ve been looking and googling around for 4h to find a solution for my problem.

I’m trying to set the text of an defined rich text content control.
For test purposes i defined just one content control (rich text) in the document where i would like to change the text.

var docx = Application.Documents.Open(@"D:\BaseDocs\Test.docx");
var all = GetAllContentControls(docx); // Returns all content controls in active document
var one = all.First(); // Select first one --> works
((RichTextContentControl)one).Text = "Test" //Trying to set text --> invalid cast exception

I can’t set the value of this predefined content control. Any help is really appreciated.

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  1. Editorial Team
    Editorial Team
    2026-05-29T09:20:39+00:00Added an answer on May 29, 2026 at 9:20 am

    Solved. I took bookmarks to solve this problem. Thank you all for helping me out.

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