)} ,System.Linq.Expressions.Expression})}
Qbservable.FirstOrDefaultAsync(IQbservable) method¶
Defined in
Type: Qbservable
Namespace: System.Reactive.Linq
Assembly: System.Reactive.dll
Applies to
net8.0, net8.0-windows10.0.19041, net8.0-ios17.5, net8.0-maccatalyst17.5, net8.0-macos14.2, net8.0-macos14.5, net8.0-tvos17.2, netstandard2.0
Overloads¶
- 1.
public static IQbservable<TSource?> FirstOrDefaultAsync<TSource>(this IQbservable<TSource> source) - 2.
public static IQbservable<TSource?> FirstOrDefaultAsync<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, bool>> predicate)
1. Overload¶
public static IQbservable<TSource?> FirstOrDefaultAsync<TSource>(this IQbservable<TSource> source)
Type parameters
| Name | Description |
|---|---|
TSource | -- |
Parameters
| Name | Type | Description |
|---|---|---|
source | [IQbservable | -- |
Returns: IQbservable
2. Overload¶
public static IQbservable<TSource?> FirstOrDefaultAsync<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, bool>> predicate)
Type parameters
| Name | Description |
|---|---|
TSource | -- |
Parameters
| Name | Type | Description |
|---|---|---|
source | [IQbservable | -- |
predicate | Expression | -- |
Returns: IQbservable