You need to use Reflection. Here's an example that checks for properties of a Button control.

using System.Reflection;
...
PropertyInfo pi;
pi = button1.GetType().GetProperty("Text");
MessageBox.Show(pi == null ? "Property does not exist." : "Property exists.");
pi = button1.GetType().GetProperty("Foo");
MessageBox.Show(pi == null ? "Property does not exist." : "Property exists.");