Using delegates to clean up multiple IF statements

example.cs

private void RunValidation()
        {
            foreach (var propertyInfo in GetType().GetProperties())
            {
                var attribute = Attribute.GetCustomAttribute(propertyInfo, typeof(RequiredField)) as RequiredField;

                if (attribute == null) continue;
                /*
                if (propertyInfo.PropertyType == typeof(string) 
                        && string.IsNullOrEmpty((string)propertyInfo.GetValue(this, null)))
                {
                    AddValidationError(propertyInfo);
                }

                if (propertyInfo.PropertyType == typeof(Guid) 
                    && (Guid)propertyInfo.GetValue(this, null) == Guid.Empty)
                {
                    AddValidationError(propertyInfo);
                }
                */
                CheckType<string>(propertyInfo, typeof(string), String.IsNullOrEmpty);
                CheckType<Guid>(propertyInfo, typeof(Guid), x => x == Guid.Empty);
            }
        }