private bool Validate()

in src/Microsoft.Diagnostics.Runtime/ClrDelegate.cs [94:142]
27 lines of code
11 McCabe index (conditional complexity)

        private bool Validate()
        {
            // The overall goal here is to throw an exception when the user created a ClrDelegate class on an object that isn't
            // a delegate.  However, we DON'T want to throw when we are failing to find the right fields due to missing metadata.
            // Note it's ok to be slow in this method because we are down a failure path that should usually not happen in practice.

            if (Object.Type is null)
                return false;

            // If we have no fields then this isn't a delegate.
            if (Object.Type.Fields.Length == 0)
                return false;

            // Assume this is a valid
            bool seenAny = false;
            bool allNull = true;

            foreach (ClrInstanceField field in Object.Type.Fields)
            {
                seenAny |= field.Name is "_methodPtr" or "_methodPtrAux";
                allNull &= field.Name is null;
            }

            // If all field names were null then we cannot validate whether this was a delegate or not.  The case we are worried
            // about here is if we have no
            if (allNull)
                return true;

            // If we saw fields we expected return it's valid even if we didn't understand this delegate.
            if (seenAny)
                return true;

            ClrType? curr = Object.Type;

            for (int i = 0; i < 8 && curr != null; i++, curr = curr.BaseType)
            {
                // If we found System.Delegate, we are done.
                if (curr.Name == DelegateType)
                    return true;

                // If we found a blank name in mscorlib then we have a metadata problem, and we cannot validate this delegate.
                // Don't throw an exception in this case.
                if (curr.Name == null && curr.Module == Object.Type.Heap.Runtime.BaseClassLibrary)
                    return true;
            }

            // We are definitely not a delegate.
            return false;
        }