MethodSignatureComparer.cs

public class MethodSignatureComparer : IEqualityComparer<ParameterInfo>
{
    public static readonly MethodSignatureComparer Default = new();

    public bool Match(MethodInfo signatureMethod, MethodInfo otherMethod)
    {
        var signatureParameters = signatureMethod.GetParameters();
        var parameters = otherMethod.GetParameters();

        if (otherMethod.Name != signatureMethod.Name)
            return false;

        if (signatureParameters.Any(x => !parameters.Contains(x, Default)))
            return false;

        return Equals(otherMethod.ReturnParameter, signatureMethod.ReturnParameter);
    }

    public bool Equals(ParameterInfo? x, ParameterInfo? y)
    {
        if (ReferenceEquals(x, y)) return true;
        if (x is null) return false;
        if (y is null) return false;
        if (x.IsOut != y.IsOut) return false;
        if (x.IsRetval != y.IsRetval) return false;
        if (x.Name != y.Name) return false;
        if (x.ParameterType != y.ParameterType) return false;
        return true;
    }

    public int GetHashCode(ParameterInfo obj) =>
        HashCode.Combine(obj.IsOut, obj.IsRetval, obj.Name, obj.ParameterType);
}