Même pas mal moi!!!!!!!!!!

if (Parent != null)
{
//Find textbox
PropertyCondition idCond = new PropertyCondition(AutomationElement.AutomationIdProperty, AutomationId);
AutomationElement CurrentTextbox = Parent.FindFirst(TreeScope.Descendants, idCond);

if (CurrentTextbox != null)
{

try
{

TextPattern txtPattern = CurrentTextbox.GetCurrentPattern(TextPattern.Pattern) as TextPattern;

// Once you have an instance of an AutomationElement,
// check if it supports the ValuePattern pattern.
object valuePattern = null;

// Control does not support the ValuePattern pattern
// so use keyboard input to insert content.
//
// NOTE: Elements that support TextPattern
// do not support ValuePattern and TextPattern
// does not support setting the text of
// multi-line edit or document controls.
// For this reason, text input must be simulated
// using one of the following methods.
//
if (!CurrentTextbox.TryGetCurrentPattern(
ValuePattern.Pattern, out valuePattern))
{

// Set focus for input functionality and begin.
CurrentTextbox.SetFocus();

// Pause before sending keyboard input.
Thread.Sleep(100);

// Delete existing content in the control and insert new content.
SendKeys.SendWait(“^{HOME}”); // Move to start of control
SendKeys.SendWait(“^+{END}”); // Select everything
SendKeys.SendWait(“{DEL}”); // Delete selection
SendKeys.SendWait(Text);
}
// Control supports the ValuePattern pattern so we can
// use the SetValue method to insert content.
else
{

// Set focus for input functionality and begin.
CurrentTextbox.SetFocus();

((ValuePattern)valuePattern).SetValue(Text);
}

}
catch (Exception ex)
{

Assert.Fail(ex.Message);
}
}
}
else
{
Assert.Fail(“parent is null”);
}
}