/// <summary>
/// Tests if the provided type is nullable
/// </summary>
/// <param name="arg"></param>
/// <returns></returns>
public static bool IsNullableType(this Type arg)
{
if (NullableTypes.TryGetValue(arg, out var cachedResult))
{
return(cachedResult);
}
var method = GenericGetDefaultValueMethod.MakeGenericMethod(arg);
var defaultValueForType = method.Invoke(null, new object[] { });
var result = defaultValueForType == null;
return(NullableTypes[arg] = result);
}
private static object DefaultValueForType(Type t)
{
var method = GenericGetDefaultValueMethod.MakeGenericMethod(t);
return(method.Invoke(null, new object[] { }));
}