The 'is' operator cannot be applied to an operand of a static type
c#, nullable
Solution
The problem is here:
if (value is Nullable
It thinks you're talking about the static class `System.Nullable` rather than the `System.Nullable<T>` struct.
Perhaps you meant:
if (value is INullable ...)
?
Note that if `value` is of compile-time type `object`, then it will never be a `Nullable<T>`, as boxing a null value would give a null reference, and boxing a non-null value would give a boxed value of the underlying type.
If you think there's still something else which you need to achieve, please specify what you're trying to do.
Problem
What does this error mean in this context? ``` if (value == null) return ""; if (value is Nullable && ((INullable)value).IsNull) //error on this line return ""; if (value is DateTime) { if (((DateTime)value).TimeOfDay.TotalSeconds == 0) return ((DateTime)value).ToString ("yyyy-MM-dd"); return ((DateTime)value).ToString ("yyyy-MM-dd HH:mm:ss"); } ``` I searched but didn't get any information on this error. I am trying this on Mono (2.10.8.1). This is a project actually meant for Windows, but when I tried to compile it in Monodevelop, I got this error.