docs(Window): add kb for programmatic center of the window (#2821)

* docs(Window): add kb for programmatic center of the window

* chore: update kb content

* Update knowledge-base/window-center-programmatically.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

* Update knowledge-base/window-center-programmatically.md

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

---------

Co-authored-by: Dimo Dimov <961014+dimodi@users.noreply.github.com>

Author: Tsvetomir-Hr

knowledge-base/window-center-programmatically.md

@@ -0,0 +1,71 @@
+---
+title: How To Center Window Programmatically
+description: Learn how to center a Telerik Window programmatically by using the Top and Left parameters.
+type: how-to
+page_title: How To Center Window Programmatically
+slug: window-kb-center-programmatically
+tags: window, center, position, blazor,
+res_type: kb
+ticketid:
+---
+
+## Environment
+<table>
+	<tbody>
+		<tr>
+			<td>Product</td>
+			<td>Window for Blazor</td>
+		</tr>
+	</tbody>
+</table>
+
+## Description
+
+This knowledge base article answers the following questions:
+
+* How can I programmatically center a Telerik Window?
+* How do I reset a Telerik Window to its default position?
+* How can I position a Telerik Window in the center of the viewport?
+* How do I dynamically adjust the Telerik Window position?
+
+## Solution
+
+To center a Telerik Window programmatically, follow these steps:
+
+1. Set the [`Top` and `Left` parameters](slug:components/window/position#top-and-left) using `@bind-Top` and `@bind-Left` or the [`TopChanged` and `LeftChanged` events](slug:window-events#leftchanged-and-topchanged).
+2. Set both parameters to `string.Empty` to center the Window initially or any time afterwards.
+3. [Call the `Refresh()` method of the Window component instance](slug:window-overview#window-reference-and-methods) to re-render the Window at the new position.
+
+>caption Center the Telerik Blazor Window Programmatically
+
+````RAZOR
+<TelerikWindow Visible="true"
+               @bind-Top="@Top"
+               @bind-Left="@Left"
+               Width="200px"
+               Height="200px"
+               @ref="WindowRef">
+    <WindowTitle>
+        Window Title
+    </WindowTitle>
+    <WindowContent>
+        <TelerikButton OnClick="@CenterWindow">Center Window</TelerikButton>
+    </WindowContent>
+</TelerikWindow>
+
+@code {
+    private TelerikWindow? WindowRef { get; set; }
+    private string Top { get; set; } = "10%";
+    private string Left { get; set; } = "10%";
+
+    private void CenterWindow()
+    {
+        Top = Left = string.Empty;
+        WindowRef?.Refresh();
+    }
+}
+````
+
+## See Also
+- [Window Position](slug:components/window/position)
+- [Telerik Window for Blazor - Overview](slug:window-overview)