> ## Documentation Index
> Fetch the complete documentation index at: https://easyaf.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# IEnumerable

> Extension methods for IEnumerable from System.Runtime

## Definition

**Assembly:** System.Runtime.dll

**Namespace:** System.Collections.Generic

## Syntax

```csharp theme={"dark"}
System.Collections.Generic.IEnumerable<T> where T : CloudNimble.EasyAF.Core.DbObservableObject
```

## Summary

This type is defined in System.Runtime.

## Remarks

See [Microsoft documentation](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable\{t}) for more information about the rest of the API.

## Methods

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> AcceptChanges <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Loops through the entries in a given [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) and accepts all current changes for each entry.

#### Syntax

```csharp theme={"dark"}
public static void AcceptChanges<T>(System.Collections.Generic.IEnumerable<T> enumerable, bool goDeep = false) where T : CloudNimble.EasyAF.Core.DbObservableObject
```

#### Parameters

| Name         | Type                                        | Description |
| ------------ | ------------------------------------------- | ----------- |
| `enumerable` | `System.Collections.Generic.IEnumerable<T>` | -           |
| `goDeep`     | `bool`                                      | -           |

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> ChangedCount <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Returns a [Int32](https://learn.microsoft.com/dotnet/api/system.int32) representing the number of objects in the enumerable that have changes.

#### Syntax

```csharp theme={"dark"}
public static int ChangedCount<T>(System.Collections.Generic.IEnumerable<T> enumerable, bool checkGraph = false) where T : CloudNimble.EasyAF.Core.DbObservableObject
```

#### Parameters

| Name         | Type                                        | Description |
| ------------ | ------------------------------------------- | ----------- |
| `enumerable` | `System.Collections.Generic.IEnumerable<T>` | -           |
| `checkGraph` | `bool`                                      | -           |

#### Returns

Type: `int`

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> ContainsId <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Returns a [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) if a list of `Id`s from the given [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) contains
the specified value.

#### Syntax

```csharp theme={"dark"}
public static bool ContainsId<T, TId>(System.Collections.Generic.IEnumerable<T> list, TId idValue) where T : class, CloudNimble.EasyAF.Core.IIdentifiable<TId> where TId : struct, System.ValueType
```

#### Parameters

| Name      | Type                                        | Description                                                                                                              |
| --------- | ------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------ |
| `list`    | `System.Collections.Generic.IEnumerable<T>` | The [List\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1) to check for the given ID value. |
| `idValue` | `TId`                                       | The value to check for.                                                                                                  |

#### Returns

Type: `bool`

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> ContentsAreChanged <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Returns a [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) if any [DbObservableObject](/api-reference/CloudNimble/EasyAF/Core/DbObservableObject) in the [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) has changes.

#### Syntax

```csharp theme={"dark"}
public static bool ContentsAreChanged<T>(System.Collections.Generic.IEnumerable<T> enumerable, bool checkGraph = false) where T : CloudNimble.EasyAF.Core.DbObservableObject
```

#### Parameters

| Name         | Type                                        | Description |
| ------------ | ------------------------------------------- | ----------- |
| `enumerable` | `System.Collections.Generic.IEnumerable<T>` | -           |
| `checkGraph` | `bool`                                      | -           |

#### Returns

Type: `bool`

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> ContentsAreChanged <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Returns a [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) if any [DbObservableObject](/api-reference/CloudNimble/EasyAF/Core/DbObservableObject) in the [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) has changes.

#### Syntax

```csharp theme={"dark"}
public static bool ContentsAreChanged<T>(System.Collections.Generic.IEnumerable<T> enumerable, System.Func<T, bool> predicate, bool checkGraph = false) where T : CloudNimble.EasyAF.Core.DbObservableObject
```

#### Parameters

| Name         | Type                                        | Description |
| ------------ | ------------------------------------------- | ----------- |
| `enumerable` | `System.Collections.Generic.IEnumerable<T>` | -           |
| `predicate`  | `System.Func<T, bool>`                      | -           |
| `checkGraph` | `bool`                                      | -           |

#### Returns

Type: `bool`

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> ContentsAreChanged <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Returns a [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) if any [DbObservableObject](/api-reference/CloudNimble/EasyAF/Core/DbObservableObject) in the [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) has changes.

#### Syntax

```csharp theme={"dark"}
public static bool ContentsAreChanged<T, TForeign, TId>(System.Collections.Generic.IEnumerable<T> enumerable, System.Collections.Generic.IEnumerable<TForeign> foreignList, System.Func<T, TId> foreignIdFunc, bool checkGraph = false) where T : CloudNimble.EasyAF.Core.DbObservableObject, CloudNimble.EasyAF.Core.IIdentifiable<TId> where TForeign : CloudNimble.EasyAF.Core.DbObservableObject, CloudNimble.EasyAF.Core.IIdentifiable<TId> where TId : struct, System.ValueType
```

#### Parameters

| Name            | Type                                               | Description                                                                                  |
| --------------- | -------------------------------------------------- | -------------------------------------------------------------------------------------------- |
| `enumerable`    | `System.Collections.Generic.IEnumerable<T>`        | -                                                                                            |
| `foreignList`   | `System.Collections.Generic.IEnumerable<TForeign>` | The list of related objects that we want to filter the *enumerable* down to.                 |
| `foreignIdFunc` | `System.Func<T, TId>`                              | The property from the *enumerable* that points to the `Id` for the objects in *foreignList*. |
| `checkGraph`    | `bool`                                             | -                                                                                            |

#### Returns

Type: `bool`

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> FilterForChanges <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

For a given [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1), filter down the result to the changed items in *enumerable*
whose foreign keys appear in the *foreignList*.

#### Syntax

```csharp theme={"dark"}
public static System.Collections.Generic.IEnumerable<T> FilterForChanges<T, TForeign, TId>(System.Collections.Generic.IEnumerable<T> enumerable, System.Collections.Generic.IEnumerable<TForeign> foreignList, System.Func<T, TId> foreignIdFunc) where T : CloudNimble.EasyAF.Core.DbObservableObject, CloudNimble.EasyAF.Core.IIdentifiable<TId> where TForeign : CloudNimble.EasyAF.Core.DbObservableObject, CloudNimble.EasyAF.Core.IIdentifiable<TId> where TId : struct, System.ValueType
```

#### Parameters

| Name            | Type                                               | Description                                                                                  |
| --------------- | -------------------------------------------------- | -------------------------------------------------------------------------------------------- |
| `enumerable`    | `System.Collections.Generic.IEnumerable<T>`        | The list we want to check for changes in.                                                    |
| `foreignList`   | `System.Collections.Generic.IEnumerable<TForeign>` | The list of related objects that we want to filter the *enumerable* down to.                 |
| `foreignIdFunc` | `System.Func<T, TId>`                              | The property from the *enumerable* that points to the `Id` for the objects in *foreignList*. |

#### Returns

Type: `System.Collections.Generic.IEnumerable<T>`

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> None <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Returns a [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) specifying whether or not the [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) has any items in it.

#### Syntax

```csharp theme={"dark"}
public static bool None<T>(System.Collections.Generic.IEnumerable<T> source)
```

#### Parameters

| Name     | Type                                        | Description                                                                                                     |
| -------- | ------------------------------------------- | --------------------------------------------------------------------------------------------------------------- |
| `source` | `System.Collections.Generic.IEnumerable<T>` | The [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) to check. |

#### Returns

Type: `bool`

#### Type Parameters

* `T` - The type of the items inside the [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.ienumerable).

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> None <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Returns a [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) specifying whether or not the [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) has any items in it.

#### Syntax

```csharp theme={"dark"}
public static bool None<T>(System.Collections.Generic.IEnumerable<T> source, System.Func<T, bool> predicate)
```

#### Parameters

| Name        | Type                                        | Description                                                                                                     |
| ----------- | ------------------------------------------- | --------------------------------------------------------------------------------------------------------------- |
| `source`    | `System.Collections.Generic.IEnumerable<T>` | The [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) to check. |
| `predicate` | `System.Func<T, bool>`                      | A set of additional parameters to check against.                                                                |

#### Returns

Type: `bool`

#### Type Parameters

* `T` - The type of the items inside the [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.ienumerable).

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> RejectChanges <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Loops through the entries in a given [IEnumerable\`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1) and clears all current changes for each entry.

#### Syntax

```csharp theme={"dark"}
public static void RejectChanges<T>(System.Collections.Generic.IEnumerable<T> enumerable, bool goDeep = false) where T : CloudNimble.EasyAF.Core.DbObservableObject
```

#### Parameters

| Name         | Type                                        | Description |
| ------------ | ------------------------------------------- | ----------- |
| `enumerable` | `System.Collections.Generic.IEnumerable<T>` | -           |
| `goDeep`     | `bool`                                      | -           |

### <Icon icon="puzzle-piece" iconType="duotone" color="#E0EC32" size={24} className="mr-2" /> ToTrackedList <Badge color="green">Extension</Badge>

<Note>Extension method from `System.Collections.Generic.EasyAF_IEnumerableExtensions`</Note>

Returns a \[List`1](https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1) where the [DbObservableObject](/api-reference/CloudNimble/EasyAF/Core/DbObservableObject)DbObservableObjects</see> have `Boolean)\` turned on.

#### Syntax

```csharp theme={"dark"}
public static System.Collections.Generic.List<T> ToTrackedList<T>(System.Collections.Generic.IEnumerable<T> enumerable, bool deepTracking = false) where T : CloudNimble.EasyAF.Core.DbObservableObject
```

#### Parameters

| Name           | Type                                        | Description                                         |
| -------------- | ------------------------------------------- | --------------------------------------------------- |
| `enumerable`   | `System.Collections.Generic.IEnumerable<T>` | The list of objects to turn change tracking on for. |
| `deepTracking` | `bool`                                      | -                                                   |

#### Returns

Type: `System.Collections.Generic.List<T>`