Hi Lamees Afify,
You can find an example of programmatically showing the Conditional Formatting Form in our Quick-Start Framework application, section RadGridView -> Conditional Formatting. Generally, you should follow the approach demonstrated in the code snippet below:
|ConditionalFormattingForm cf = new ConditionalFormattingForm(this.radGridView1.MasterGridViewTemplate, null);
If you have additional questions, feel free to contact me.
the Telerik team
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