/// <summary>
/// Determines whether the specified object is null.
/// </summary>
public static bool IsNull <T>(this T arg)
{
#pragma warning disable IDE0041 // Use 'is null' check
if (ReferenceEquals(null, arg))
{
return(true);
}
#pragma warning restore IDE0041 // Use 'is null' check
Type t = typeof(T);
if (t.IsGenericType && ((t.IsGenericTypeDefinition && t.Equals(StaticTypes.nullableTypeDefinition)) || t.GetGenericTypeDefinition().Equals(StaticTypes.nullableTypeDefinition)))
{
PropertyInfo hasValueProperty = t.GetProperty("HasValue");
return(!(bool)hasValueProperty.GetValue(arg));
}
if (NullTypes.Any(type => !(type is null) && t.IsAssignableFrom(type)))
{
return(true);
}
if (NullValues.Any(value => ReferenceEquals(value, arg) || arg.Equals(value) || (value is IEquatable <T> equatable && equatable.Equals(arg))))
{
return(true);
}
return(false);
}
