System.ComponentModel.TypeDescriptor.AttributeProvider.AttributeTypeDescriptor.GetAttributes C# (CSharp) Method

                public override AttributeCollection GetAttributes()
                {
                    Attribute[] finalAttr = null;
                    AttributeCollection existing = base.GetAttributes();
                    Attribute[] newAttrs = _attributeArray;
                    Attribute[] newArray = new Attribute[existing.Count + newAttrs.Length];
                    int actualCount = existing.Count;
                    existing.CopyTo(newArray, 0);

                    for (int idx = 0; idx < newAttrs.Length; idx++)
                    {
                        Debug.Assert(newAttrs[idx] != null, "_attributes contains a null member");

                        // We must see if this attribute is already in the existing
                        // array.  If it is, we replace it.
                        bool match = false;
                        for (int existingIdx = 0; existingIdx < existing.Count; existingIdx++)
                        {
                            if (newArray[existingIdx].TypeId.Equals(newAttrs[idx].TypeId))
                            {
                                match = true;
                                newArray[existingIdx] = newAttrs[idx];
                                break;
                            }
                        }

                        if (!match)
                        {
                            newArray[actualCount++] = newAttrs[idx];
                        }
                    }

                    // Now, if we collapsed some attributes, create a new array.
                    //
                    if (actualCount < newArray.Length)
                    {
                        finalAttr = new Attribute[actualCount];
                        Array.Copy(newArray, 0, finalAttr, 0, actualCount);
                    }
                    else
                    {
                        finalAttr = newArray;
                    }

                    return new AttributeCollection(finalAttr);
                }
            }