## TrendlineCollection class

Represents a collection of all the <see cref="Trendline"/> objects for the specified data series.

```go

type TrendlineCollection struct  {
	ptr unsafe.Pointer
}

```
## Constructors

| Method | Description |
| --- | --- |

## Methods

| Method | Description |
| --- | --- |
|[IsNull](./isnull/) | Checks whether the implementation object is nullptr. | 
|[Add_TrendlineType](./add_trendlinetype/) | Adds a Trendline object to this collection with the specified type. | 
|[Add_TrendlineType_String](./add_trendlinetype_string/) | Adds a Trendline object to this collection with specified type and name. | 
|[Get](./get/) | Gets a Trendline object by its index. | 
|[GetCount](./getcount/) | Gets the number of elements contained in the instance. |