kb(slider):add kb for max parameter zero in slider (#564)

* kb(slider):add kb for max parameter zero in slider

* Update knowledge-base/slider-max-parameter-zero-error.md

Co-authored-by: Dimo Dimov <[email protected]>

* Update knowledge-base/slider-max-parameter-zero-error.md

Co-authored-by: Dimo Dimov <[email protected]>

* Update knowledge-base/slider-max-parameter-zero-error.md

Co-authored-by: Dimo Dimov <[email protected]>

* Update knowledge-base/slider-max-parameter-zero-error.md

Co-authored-by: Dimo Dimov <[email protected]>

Co-authored-by: Dimo Dimov <[email protected]>

Author: xristianstefanov

knowledge-base/slider-max-parameter-zero-error.md

@@ -0,0 +1,53 @@
+---
+title: Requires the Max parameter error in Slider
+description: Blazor Slider requires a Max parameter and throws an error if zero is set.
+type: troubleshooting
+page_title: Requires the Max parameter error in Slider
+slug: slider-kb-max-parameter-zero-error
+position: 
+tags: 
+ticketid: 1541425
+res_type: kb
+---
+
+## Environment
+<table>
+	<tbody>
+		<tr>
+			<td>Product</td>
+			<td>Slider for Blazor</td>
+		</tr>
+	</tbody>
+</table>
+
+
+## Description
+I'm using the Telerik Slider, and I can't set Max to 0. When I set the Max parameter to zero, the component throws an error.
+
+## Error Message
+>warning ArgumentException: Telerik.Blazor.Components.TelerikSlider`1[System.Int32] requires the Max parameter.
+
+## Cause\Possible Cause(s)
+The `Max` parameter is a required attribute and the component is checking if it is set. If the developer doesn't set any value for `Max` and the Slider `Value` type is `int`, then the `Max` parameter value will match the default value of the `int` type. This causes the observed error. The default value for the non-nullable `int` type is 0, and when you explicitly set `Max` to 0, the component acts like there is no parameter value set and still throws the error.
+
+## Solution
+You can avoid the exception by using a nullable type for the Slider `Value`.
+
+>caption Set Max parameter to zero in the Slider
+
+````CSHTML
+@* Example with nullable type of the value  *@
+@Volume
+<br />
+<TelerikSlider @bind-Value="@Volume"
+               Min="-3"
+               Max="0"
+               SmallStep="1"
+               LargeStep="1"
+               Width="400px">
+</TelerikSlider>
+
+@code{
+    int? Volume { get; set; }
+}
+````