At present there is no direct option to customize the Needle Length in RadialGauge control and it is possible to modify the length of the needle using support, which helps to customize all the elements appearance in RadialGauge.
The following steps will guide to achieve this requirement.
Step 1: Create a Custom control derived from the RadialGauge and implement property to customize the Needle Length.
Here implemented a property named NeedleLength, to customize the NeedleLength.
Step 2: Create Custom Renderer class derived from the IRadialGaugeRanderer and this class will help to custom draw RadialGauge control. In this class, Needle drawn using function named DrawNeedle and here Needle Length is customized.
Step 3: Here we are applying NeedleLength in customized RadialGauge.
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