public void Add_SameNamespace_DoesntAdd()
{
var collection = new CodeNamespaceImportCollection();
var value1 = new CodeNamespaceImport("Namespace");
collection.Add(value1);
collection.Add(value1);
Assert.Equal(1, collection.Count);
var value2 = new CodeNamespaceImport("Namespace");
collection.Add(value2);
Assert.Equal(1, collection.Count);
}