> ## Documentation Index > Fetch the complete documentation index at: https://easyaf.dev/llms.txt > Use this file to discover all available pages before exploring further. # Overview > Summary of the CloudNimble.EasyAF.Core Namespace ## Types ### Classes | Name | Summary | | ----------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [DbObservableObject](/api-reference/CloudNimble/EasyAF/Core/DbObservableObject) | A base class for Entity Framework objects to implement [INotifyPropertyChanged](https://learn.microsoft.com/dotnet/api/system.componentmodel.inotifypropertychanged), [IChangeTracking](https://learn.microsoft.com/dotnet/api/system.componentmodel.ichangetracking), and [IRevertibleChangeTracking](https://learn.microsoft.com/dotnet/api/system.componentmodel.irevertiblechangetracking) in front-end development. | | [EasyObservableObject](/api-reference/CloudNimble/EasyAF/Core/EasyObservableObject) | A base class for objects to implement [INotifyPropertyChanged](https://learn.microsoft.com/dotnet/api/system.componentmodel.inotifypropertychanged). Provides strongly-typed property change notifications and automatic property setting with change detection. | | [Ensure](/api-reference/CloudNimble/EasyAF/Core/Ensure) | Provides methods for ensuring that method arguments meet specific criteria. This class provides a consistent way to validate arguments and throw appropriate exceptions. | | [HttpHandlerMode](/api-reference/CloudNimble/EasyAF/Core/HttpHandlerMode) | Specifies how HttpClient message handlers should be configured when registering HTTP clients. Determines whether handlers are added to existing handlers or replace them entirely. | | [IIdentifiableEqualityComparer](/api-reference/CloudNimble/EasyAF/Core/IIdentifiableEqualityComparer) | Provides an equality comparer for objects that implement `IIdentifiable`1\`. Compares objects based on their Id property values for equality and hash code generation. | | [Interval](/api-reference/CloudNimble/EasyAF/Core/Interval) | Describes an interval of time to be used in time-based calculations. Provides methods to calculate rates and frequencies based on the interval value and type. | | [IntervalType](/api-reference/CloudNimble/EasyAF/Core/IntervalType) | Specifies the type of interval duration. | | [MoneyInterval](/api-reference/CloudNimble/EasyAF/Core/MoneyInterval) | Represents a sum of money to be exchanged during a given interval. | | [NameOf](/api-reference/CloudNimble/EasyAF/Core/NameOf) | Fills a gap in `nameof` by allowing you to use deep name references instead of local name references. | | [PercentageInterval](/api-reference/CloudNimble/EasyAF/Core/PercentageInterval) | Represents a percentage rate that occurs at regular time intervals, enabling conversion between different time periods. This class combines a base time interval (from the `Interval`1\` class) with a percentage rate to calculate total percentage amounts across different time periods. | | [RatioInterval](/api-reference/CloudNimble/EasyAF/Core/RatioInterval) | Represents a ratio value that occurs at regular time intervals, enabling conversion between different time periods. This class combines a base time interval (from the `Interval`1\` class) with a ratio value to calculate total ratio amounts across different time periods. | ### Interfaces | Name | Summary | | ----------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [IActiveTrackable](/api-reference/CloudNimble/EasyAF/Core/IActiveTrackable) | An interface that implements the CloudNimble common pattern for tracking who created an Entity. | | [ICreatedAuditable](/api-reference/CloudNimble/EasyAF/Core/ICreatedAuditable) | An interface that implements the CloudNimble common pattern for tracking who created an Entity. | | [ICreatorTrackable](/api-reference/CloudNimble/EasyAF/Core/ICreatorTrackable) | An interface that implements the CloudNimble common pattern for tracking who created an Entity. | | [IDbEnum](/api-reference/CloudNimble/EasyAF/Core/IDbEnum) | An interface that represents the CloudNimble database-driven enumeration pattern that lets you update the Enum as processes change without changing the meaning of Entities that are linked to the older enums. | | [IDbStateEnum](/api-reference/CloudNimble/EasyAF/Core/IDbStateEnum) | An interface that identifies this Entity as being the enumeration details for the SimpleStateMachine. | | [IDbStatusEnum](/api-reference/CloudNimble/EasyAF/Core/IDbStatusEnum) | An interface that identifies this Entity as being the enumeration details for the SimpleStateMachine. | | [IHasState](/api-reference/CloudNimble/EasyAF/Core/IHasState) | An interface that specifes an implementing Entity changes State as part of the SimpleStateMachine. | | [IHasStatus](/api-reference/CloudNimble/EasyAF/Core/IHasStatus) | An interface that specifes an implementing Entity contains a child Entity of T that implements [IDbStatusEnum](/api-reference/CloudNimble/EasyAF/Core/IDbStatusEnum) and represents the Entity's current status. | | [IHumanReadable](/api-reference/CloudNimble/EasyAF/Core/IHumanReadable) | An interface that specifies the implementing Entity displays text to the user. | | [IIdentifiable](/api-reference/CloudNimble/EasyAF/Core/IIdentifiable) | An interface that guarantees a particular Entity contains an "Id" property with a type *T*. | | [ISortable](/api-reference/CloudNimble/EasyAF/Core/ISortable) | An interface that specifies the implementing Entity can be contains an [Int32](https://learn.microsoft.com/dotnet/api/system.int32) that tracks the order items should be displayed in a list. | | [IUpdatedAuditable](/api-reference/CloudNimble/EasyAF/Core/IUpdatedAuditable) | An interface that implements the CloudNimble common pattern for tracking who created an Entity. | | [IUpdaterTrackable](/api-reference/CloudNimble/EasyAF/Core/IUpdaterTrackable) | An interface that implements the CloudNimble common pattern for tracking who updated an Entity. | ### Enums | Name | Summary | | ------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [HttpHandlerMode](/api-reference/CloudNimble/EasyAF/Core/HttpHandlerMode) | Specifies how HttpClient message handlers should be configured when registering HTTP clients. Determines whether handlers are added to existing handlers or replace them entirely. | | [IntervalType](/api-reference/CloudNimble/EasyAF/Core/IntervalType) | Specifies the type of interval duration. |