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Elements in the adorner layer are rendered on top of the rest of the visual elements and they will not be considered when the layout system is measuring and arranging the controls on the adorned element layer.The adorned element in this case is the Text Box control itself and you include an in the control template where you want to leave space for it.

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could not be converted” when the conversion of the string value to an int fails, you may want to customize it.Please help me with the required code This is Xaml code: , you can do the validation in that instead of the setter of a particular property, then whenever there is a error, return an error message so that the text box which has the error gets a red box around it, indicating an error.To get it done only with XAML you need to add Validation Rules for individual properties.Correspondingly, an underlying data value in the view model is automatically updated when the user modifies the bound value in the view.Provided that the view model has a property called “Name”, you bind it to a Text Box’s Text property in XAML the following way: Besides the path that specifies the name of the property to bind to, the binding must also have a source object.

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