System.Reflection.CustomAttributeData.Init C# (CSharp) Method

        private void Init(FieldOffsetAttribute fieldOffset)
        {
            m_ctor = typeof(FieldOffsetAttribute).GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[] {
                new CustomAttributeTypedArgument(fieldOffset.Value)
            });
            m_namedArgs = Array.AsReadOnly(new CustomAttributeNamedArgument[0]);
        }
        private void Init(MarshalAsAttribute marshalAs)