# ComponentType > A struct to define a component including how it's accessed and what type of component it is ## Definition * **Type:** Struct * **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md) * **Assembly:** UnityEngine.EntitiesModule * **Implements:** [IEquatable\](https://learn.microsoft.com/dotnet/api/system.iequatable-1), [IComparable\](https://learn.microsoft.com/dotnet/api/system.icomparable-1) ```csharp public struct ComponentType : IEquatable, IComparable ``` ## Fields | Value | Description | | ------------------------------------------------------------------------------------------------ | ------------------------------------------- | | [AccessModeType](/engine/7000.0/script-reference/unity/entities/componenttype/accessmodetype.md) | The way the component type will be accessed | | [TypeIndex](/engine/7000.0/script-reference/unity/entities/componenttype/typeindex.md) | A unique index of the component type | ## Constructors | Constructor | Description | | ------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------- | | [ComponentType(System.Type,Unity.Entities.ComponentType.AccessMode)](/engine/7000.0/script-reference/unity/entities/componenttype/ctor.md) | Create a component type | ## Properties | Property | Description | | -------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [HasEntityReferences](/engine/7000.0/script-reference/unity/entities/componenttype/hasentityreferences.md) | True if any of the fields in the component type are type [Entity](/engine/7000.0/script-reference/unity/entities/entity.md) | | [HasNativeContainer](/engine/7000.0/script-reference/unity/entities/componenttype/hasnativecontainer.md) | The component type contains a NativeContainerAttribute decorated member. NativeContainer members found in nested member types will also cause this property to return true. | | [IsBuffer](/engine/7000.0/script-reference/unity/entities/componenttype/isbuffer.md) | True if the component type is a [IBufferElementData](/engine/7000.0/script-reference/unity/entities/ibufferelementdata.md) | | [IsChunkComponent](/engine/7000.0/script-reference/unity/entities/componenttype/ischunkcomponent.md) | True if the component type is flagged as a chunk component type | | [IsChunkSerializable](/engine/7000.0/script-reference/unity/entities/componenttype/ischunkserializable.md) | True if the component type is appropriate for chunk serialization. Such types are blittable without containing pointer types or have been decorated with [ChunkSerializableAttribute](/engine/7000.0/script-reference/unity/entities/chunkserializableattribute.md). | | [IsCleanupBufferComponent](/engine/7000.0/script-reference/unity/entities/componenttype/iscleanupbuffercomponent.md) | Bitflag set for component types inheriting from [ICleanupBufferElementData](/engine/7000.0/script-reference/unity/entities/icleanupbufferelementdata.md). | | [IsCleanupComponent](/engine/7000.0/script-reference/unity/entities/componenttype/iscleanupcomponent.md) | True if the component type is a [ICleanupComponentData](/engine/7000.0/script-reference/unity/entities/icleanupcomponentdata.md) | | [IsCleanupSharedComponent](/engine/7000.0/script-reference/unity/entities/componenttype/iscleanupsharedcomponent.md) | True if the component type is a [ICleanupSharedComponentData](/engine/7000.0/script-reference/unity/entities/icleanupsharedcomponentdata.md) | | [IsComponent](/engine/7000.0/script-reference/unity/entities/componenttype/iscomponent.md) | True if the component type is a [IComponentData](/engine/7000.0/script-reference/unity/entities/icomponentdata.md) | | [IsEnableable](/engine/7000.0/script-reference/unity/entities/componenttype/isenableable.md) | True if the component type is a [IEnableableComponent](/engine/7000.0/script-reference/unity/entities/ienableablecomponent.md) | | [IsSharedComponent](/engine/7000.0/script-reference/unity/entities/componenttype/issharedcomponent.md) | True if the component type is a [ISharedComponentData](/engine/7000.0/script-reference/unity/entities/isharedcomponentdata.md) | | [IsZeroSized](/engine/7000.0/script-reference/unity/entities/componenttype/iszerosized.md) | True if the component type does not contain actual fields or data | ## Methods | Method | Description | | ------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------- | | [CompareTo](/engine/7000.0/script-reference/unity/entities/componenttype/compareto.md) | Returns the sort order this component type compared to another | | [Equals](/engine/7000.0/script-reference/unity/entities/componenttype/equals.md) | Checks to see if an object is equal to this component type. | | [GetHashCode](/engine/7000.0/script-reference/unity/entities/componenttype/gethashcode.md) | A hash used for comparisons. | | [GetManagedType](/engine/7000.0/script-reference/unity/entities/componenttype/getmanagedtype.md) | Gets the managed Type based on the component's [ComponentType.TypeIndex](/engine/7000.0/script-reference/unity/entities/componenttype/typeindex.md). | | [ToFixedString](/engine/7000.0/script-reference/unity/entities/componenttype/tofixedstring.md) | Returns a fixed string of the component type | | [ToString](/engine/7000.0/script-reference/unity/entities/componenttype/tostring.md) | Returns a managed string of the component type | ## Static Methods | Method | Description | | ---------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [ChunkComponent](/engine/7000.0/script-reference/unity/entities/componenttype/chunkcomponent.md) | Returns a [ComponentType](/engine/7000.0/script-reference/unity/entities/componenttype.md) that is a chunk component with [ComponentType.AccessMode.ReadWrite](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode/readwrite.md) based on the type. | | [ChunkComponentExclude](/engine/7000.0/script-reference/unity/entities/componenttype/chunkcomponentexclude.md) | Returns a [ComponentType](/engine/7000.0/script-reference/unity/entities/componenttype.md) that is a chunk component with [ComponentType.AccessMode.Exclude](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode/exclude.md) based on the type. | | [ChunkComponentReadOnly](/engine/7000.0/script-reference/unity/entities/componenttype/chunkcomponentreadonly.md) | Returns a [ComponentType](/engine/7000.0/script-reference/unity/entities/componenttype.md) that is a chunk component with [ComponentType.AccessMode.ReadOnly](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode/readonly.md) based on the type. | | [Combine](/engine/7000.0/script-reference/unity/entities/componenttype/combine.md) | Combine multiple array of component type into one. Duplicate types are removed. It will allocate an array containing all component type. Useful for creating queries during initialization of systems. | | [Exclude](/engine/7000.0/script-reference/unity/entities/componenttype/exclude.md) | Returns a [ComponentType](/engine/7000.0/script-reference/unity/entities/componenttype.md) with [ComponentType.AccessMode.Exclude](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode/exclude.md) based on the type. | | [FromTypeIndex](/engine/7000.0/script-reference/unity/entities/componenttype/fromtypeindex.md) | Returns a [ComponentType](/engine/7000.0/script-reference/unity/entities/componenttype.md) with [ComponentType.AccessMode.ReadWrite](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode/readwrite.md) based on the typeIndex | | [ReadOnly](/engine/7000.0/script-reference/unity/entities/componenttype/readonly.md) | Returns a [ComponentType](/engine/7000.0/script-reference/unity/entities/componenttype.md) with [ComponentType.AccessMode.ReadOnly](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode/readonly.md) based on the type. | | [ReadWrite](/engine/7000.0/script-reference/unity/entities/componenttype/readwrite.md) | Returns a [ComponentType](/engine/7000.0/script-reference/unity/entities/componenttype.md) with [ComponentType.AccessMode.ReadWrite](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode/readwrite.md) based on the type. | ## Operators | Operator | Description | | -------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [operator ==](/engine/7000.0/script-reference/unity/entities/componenttype/op-equality.md) | Evaluates if two component types are equal based on [ComponentType.TypeIndex](/engine/7000.0/script-reference/unity/entities/componenttype/typeindex.md) and [ComponentType.AccessModeType](/engine/7000.0/script-reference/unity/entities/componenttype/accessmodetype.md). | | [operator >](/engine/7000.0/script-reference/unity/entities/componenttype/op-greaterthan.md) | Evaluates if one component type is greater than the the other. | | [ComponentType](/engine/7000.0/script-reference/unity/entities/componenttype/op-implicit.md) | Creates a new component type based on the type passed in | | [operator !=](/engine/7000.0/script-reference/unity/entities/componenttype/op-inequality.md) | Evaluates if two component types are not equal based on [ComponentType.TypeIndex](/engine/7000.0/script-reference/unity/entities/componenttype/typeindex.md) and [ComponentType.AccessModeType](/engine/7000.0/script-reference/unity/entities/componenttype/accessmodetype.md). | | [operator \<](/engine/7000.0/script-reference/unity/entities/componenttype/op-lessthan.md) | Evaluates if one component type is less than the the other first by [ComponentType.TypeIndex](/engine/7000.0/script-reference/unity/entities/componenttype/typeindex.md), then by [ComponentType.AccessMode](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode.md). | ## Enums | Enum | Description | | ------------------------------------------------------------------------------------------------------ | -------------------------------- | | [ComponentType.AccessMode](/engine/7000.0/script-reference/unity/entities/componenttype/accessmode.md) | The access of the component type |