I have a default list of attributes and in incoming list of attributes. I need to remove any items from the incoming list that do now match the Name in the default list. I have tried many different LINQ queries, but have not been able to accomplish this task.
Default List:

Attributes[] defaultAttributes = 
{
    new ProfileAttributes() { Name = "FirstName", Include = false, Required = false },
    new ProfileAttributes() { Name = "MiddleName", Include = false, Required = false },
    new ProfileAttributes() { Name = "HomeCountry", Include = false, Required = false },
...

I want to merge the two lists and remove any items where the Name of the incoming list does not match the default list.
For example in the following remove Favorite color because it is an invalid name and preserve the required values.

Attributes[] incomingAttributes = 
{
    new ProfileAttributes() { Name = "FavoriteColor", Required = true },
    new ProfileAttributes() { Name = "MiddleName", Required = false},
    new ProfileAttributes() { Name = "HomeCountry", Required = true },

Most incoming lists will not have "Include" So I need to add that and set it to true if it is in the incoming list, otherwise false. I have done that with the following, but interested if there is a way to combine this with the merge.

Revised, I used the following solution: I used lists instead of array lists. I found this easier to loop through and bind to checkboxes on the form

Attributes[] defaultAttributes

to

List<ProfileAttributes> defaultAttributes = new List<ProfileAttributes>()

Inside the loop for my form:

<input type="checkbox"for="myModel.ProfileAttributes[i].Include"

I created an empty list:

List<ProfileAttributes> validListAttributes = new();

Then I created a loop. If the name is valid add it to the empty list and add the Include attribute:

foreach (var a in myModel.ProfileAttributes) //incomingAttributes
 {
    if (defaultAttributes.Any(d => d.Name == a.Name))
    {
        a.Include = true;
        validListAttributes.Add(a);
    }
 }

Then another loop to add missing attributes because all attributes must be display on the form:

foreach (var d in defaultAttributes)
{
   if (!validListAttributes.Any(v => v.Name == d.Name))
   {
      validListAttributes.Add(d);
    }
}

Then update the model with the valid list containing all attributes:

myModel.ProfileAttributes = validListAttributes.ToList();