check if PropertyDescriptor has attribute

You could use LINQ. A chain of the .OfType<T>() and .Any() extension methods would do the job just fine:

PropertyDescriptor targetProp = targetProps[i];
bool hasDataMember = targetProp.Attributes.OfType<DataMemberAttribute>().Any();

There are 3 ways:

• First:

  PropertyDescriptor targetProp = targetProps[i];
  bool hasDataMember = targetProp.Attributes.Contains(new DataMemberAttribute());
  

• Second:

  PropertyDescriptor targetProp = targetProps[i];
  bool hasDataMember = targetProp.Attributes.OfType<DataMemberAttribute>().Any();
  

• Third:

  PropertyDescriptor targetProp = targetProps[i];
  bool hasDataMember = targetProp.Attributes.Matches(new DataMemberAttribute());
  

Best Regard!

Found a much nicer answer in there: https://stackoverflow.com/a/2051116/605586

Basically you can just use:

bool hasDataMember = Attribute.IsDefined(property, typeof(DataMemberAttribute));