sonar-dotnet NET-1534 Rule Idea: `void` method implementations should not be `async`

interface IInterface
{
    void InterfaceMethod();
}

class Base
{
    protected virtual void BaseMethod() {}
}

class Sample : Base, IInterface
{
    public async void InterfaceMethod() {}           // Noncompliant 
    protected override async void BaseMethod() {}    // Noncompliant
    protected virtual async void VirtualMethod() {}  // Noncompliant
    async void OtherMethod() {}                      // Compliant: covered by S3168
}

This rule complements S3168, which ignores methods that implement an interface, override a base method, or are virtual. Having this functionality as a separate rule allows users to tailor their analysis to their needs.