private object ValidateAndGetValue(FieldValueProvider valueProvider)
{
if (valueProvider == null)
{
throw new ArgumentNullException(nameof(valueProvider));
}
return(valueProvider.Invoke());
}
public string CheckFieldToErrors(FieldValueProvider <T> valueProvider)
{
if (valueProvider == null)
{
throw new InvalidOperationException("Null provider", new ArgumentNullException(nameof(valueProvider)));
}
return(CheckFieldToErrors(valueProvider.Invoke()));
}