#### [Abblix\.Oidc\.Server](https://www.abblix.com/en/docs/api/abblix-oidc-server 'index')
### [Abblix\.Oidc\.Server\.Common\.Constants](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Constants 'Abblix\.Oidc\.Server\.Common\.Constants')

## GrantTypes Class

Represents OAuth 2\.0 grant types\.

```csharp
public static class GrantTypes
```

Inheritance [System\.Object](https://learn.microsoft.com/en-us/dotnet/api/system.object 'System\.Object') → GrantTypes
### Fields

## GrantTypes\.AuthorizationCode Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.AuthorizationCode}

Represents the Authorization Code grant type\. Used when a client wants to exchange an authorization code
for an access token\. Commonly used in web applications with server\-side backends\.

```csharp
public const string AuthorizationCode = "authorization_code";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')

## GrantTypes\.Ciba Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.Ciba}

Represents the CIBA \(Client Initiated Backchannel Authentication\) grant type\.
Used for authentication with minimal user interaction, often in use cases like strong customer authentication\.

```csharp
public const string Ciba = "urn:openid:params:grant-type:ciba";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')

## GrantTypes\.ClientCredentials Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.ClientCredentials}

Represents the Client Credentials grant type\. Used when a client requests an access token using its
own credentials\. Suitable for machine\-to\-machine communication\.

```csharp
public const string ClientCredentials = "client_credentials";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')

## GrantTypes\.DeviceAuthorization Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.DeviceAuthorization}

Represents the Device Authorization grant type\. This grant type is used in scenarios where the client device
lacks a browser or has limited input capabilities, allowing it to get user authorization from another device
with better input capabilities\. It is particularly useful for devices in the IoT \(Internet of Things\) sector
and smart devices that require user interaction for authorization\.

```csharp
public const string DeviceAuthorization = "urn:ietf:params:oauth:grant-type:device_code";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')

## GrantTypes\.Implicit Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.Implicit}

Represents the Implicit grant type\. Used in single\-page applications to get access tokens directly
from the authorization endpoint\. Suitable for browser\-based applications\.

```csharp
public const string Implicit = "implicit";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')

## GrantTypes\.JwtBearer Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.JwtBearer}

Represents the JWT Bearer grant type\. Allows clients to request access tokens using a JWT
\(JSON Web Token\) assertion\. Useful for securing API\-to\-API communication\.

```csharp
public const string JwtBearer = "urn:ietf:params:oauth:grant-type:jwt-bearer";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')

## GrantTypes\.Password Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.Password}

Represents the Password grant type\. Allows clients to exchange a username and password for an access token\.
Should be used with caution due to potential security risks\.

```csharp
public const string Password = "password";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')

## GrantTypes\.RefreshToken Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.RefreshToken}

Represents the Refresh Token grant type\. Used to get a new access token using a refresh token\.
Helpful for maintaining user sessions without requiring re\-authentication\.

```csharp
public const string RefreshToken = "refresh_token";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')

## GrantTypes\.TokenExchange Field {#Abblix.Oidc.Server.Common.Constants.GrantTypes.TokenExchange}

Represents the Token Exchange grant type per RFC 8693\. Allows a client holding a token issued by this AS
\(or, in federated scenarios, by a trusted external IdP\) to exchange it for a new token with possibly
narrower scope, different audience, or a different token type\. Supports both impersonation \(the issued
token represents the original subject directly\) and delegation \(an `act` claim chain records the
intermediate actor\)\.

```csharp
public const string TokenExchange = "urn:ietf:params:oauth:grant-type:token-exchange";
```

#### Field Value
[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')