Set field and method to static with Mono.Cecil

Using Fody/Mono.Cecil, I'm attempting to modify IL post build to turn some fields and methods to static.

foreach (var type in ModuleDefinition.Types)
{
    foreach (var f in type.Fields.Where(IsEventHandler))
    {
        f.IsStatic = true;
    }

    foreach (var m in type.Methods.Where(NeedStaticKeyword))
    {
        m.IsStatic = true;
        m.HasThis = false;
    }
}

However, PEVerify complains

MSBUILD : error : [IL]: Error: \xamarin.ios10\LibVLCSharp.dll : LibVLCSharp.Shared.MediaPlayer::add_PositionChanged][offset 0x00000038] Unrecognized arguments for delegate .ctor.(Error: 0x801318AA)
2>MSBUILD : error : [IL]: Error: \xamarin.ios10\LibVLCSharp.dll : LibVLCSharp.Shared.MediaPlayer::remove_PositionChanged][offset 0x00000038] Unrecognized arguments for delegate .ctor.(Error: 0x801318AA)
2>MSBUILD : error : [IL]: Error: \xamarin.ios10\LibVLCSharp.dll : LibVLCSharp.Shared.MediaPlayer::OnPositionChanged][offset 0x00000002][found Native Int][expected ref 'LibVLCSharp.Shared.MediaPlayer'] Unexpected type on the stack.(Error: 0x80131854)

Regarding the first 2 errors, my understanding is even though I set the field to static, references to it did not get the message and are still using .this (ldarg.0) to perform the call which makes the IL invalid. Tried removing that instruction but got other errors. Is my assumption correct? How do I fix it?

Regarding the last error, I'd say some IL magic is needed as well but looking at Body.Instructions, no idea what.

Any help welcome.