C# Reflection: How to get the type of a Nullable?

Question

What I want to do is something like this:

switch( myObject.GetType().GetProperty( \"id\") )
{
    case ??: 
        // when Nullable, do this
           


        

Answer 1

I've been using the following type of code to check if the type is nullable and to get the actual type:

if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
{
    return Nullable.GetUnderlyingType(type);
}

If the type is e.g. Nullable this code returns the int part (underlying type). If you just need to convert object into specific type you could use System.Convert.ChangeType method.