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Problem with TreeNodeCollection.ContainsKey ()

I am creating a plugin for an application that works with the concept of families. Each family belongs to a family category, and each family contains FamilySymbols. Good tree structure:

  • FamilyCategory (Doors)
    • Family (external doors)
      • FamilySymbol (Door 2000x1000)
      • FamilySymbol (Door 2000x900)
    • Family (garage door)
      • FamilySymbol (Door 2000x2000)
      • FamilySymbol (Door 2100x2000)
  • FamilyCategory (Windows)
    • Family (Single Windows)
      • FamilySymbol (Window 1000x1400)
      • FamilySymbol (Window 800x1400)
    • Family (Double Windows)
      • FamilySymbol (Window 2000x1400)
      • FamilySymbol (window 2100x1400)

TreeView, . , FamilyCategory. , TreeNode FamilyCategory, , node. node , . , Exists false.

foreach (Family family in families)
{
    string familyCategoryName = family.FamilyCategory.Name;

    bool categoryExists = treeView.Nodes.ContainsKey(familyCategoryName);

    if (categoryExists)
    {
        categoryNode = treeView.Nodes[familyCategoryName];
    }
    else
    {
        categoryNode = new TreeNode(familyCategoryName);
        treeView.Nodes.Add(categoryNode);
    }

    TreeNode familyNode = new TreeNode(family.Name);

    categoryNode.Nodes.Add(familyNode);

    foreach (FamilySymbol familySymbol in family.Symbols)
    {
        familyNode.Nodes.Add(familySymbol.Name);
    }
}

?

+3
1

:

categoryNode = new TreeNode(familyCategoryName);
treeView.Nodes.Add(categoryNode);

:

categoryNode = new TreeNode(familyCategoryName);
categoryNode.Name = familyCategoryName;
treeView.Nodes.Add(categoryNode);

(TreeNodeCollection.ContainsKey() Name, Text)

+8

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