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I have a method which is Async "upstream". I'm trying to follow best practice and go all-in qith async all the way up the stack.

Within a Controller action within MVC I predictably hit the deadlock issue If I rely on .Result().

Changing the Controller action to async seems to be the way to go, though the issue is that the async method is called multiple times within a lambda.

How can I await on a lamda that returns multiple results?

public async Task<JsonResult> GetLotsOfStuff() { IEnumerable<ThingDetail> things= previouslyInitialisedCollection .Select(async q => await GetDetailAboutTheThing(q.Id))); return Json(result, JsonRequestBehavior.AllowGet); } 

You can see I have tried making the lambda async, but this just gives a compiler exception:

Cannot convert source type

System.Collections.Generic.IEnumerable<System.Threading.Tasks.Task to target type `System.Collections.Generic.IEnumerable

Where am I going wrong here?

I have a method which is Async "upstream". I'm trying to follow best practice and go all-in qith async all the way up the stack.

Within a Controller action within MVC I predictably hit the deadlock issue If I rely on .Result().

Changing the Controller action to async seems to be the way to go, though the issue is that the async method is called multiple times within a lambda.

How can I await on a lamda that returns multiple results?

public async Task<JsonResult> GetLotsOfStuff() { IEnumerable<ThingDetail> things= previouslyInitialisedCollection .Select(async q => await GetDetailAboutTheThing(q.Id))); return Json(result, JsonRequestBehavior.AllowGet); } 

You can see I have tried making the lambda async, but this just gives a compiler exception:

Cannot convert source type

System.Collections.Generic.IEnumerable<System.Threading.Tasks.Task<ThingDetail> to target type System.Collections.Generic.IEnumerable<ThingDetail>

Where am I going wrong here?

I have a method which is Async "upstream". I'm trying to follow best practice and go all-in qith async all the way up the stack.

Within a Controller action within MVC I predictably hit the deadlock issue If I rely on .Result().

Changing the Controller action to async seems to be the way to go, though the issue is that the async method is called multiple times within a lambda.

How can I await on a lamda that returns multiple results?

 public async Task<JsonResult> GetLotsOfStuff()   { IEnumerable<ThingDetail> things= previouslyInitialisedCollection.Select(async q => await GetDetailAboutTheThing(q.Id)));   return Json(result, JsonRequestBehavior.AllowGet);  } 

You can see I have tried making the lambda async, but this just gives a compiler exception:

Cannot convert source type

System.Collections.Generic.IEnumerable<System.Threading.Tasks.Task<ThingDetail>> to target type System.Collections.Generic.IEnumerable<ThingDetail>

Where am I going wrong here?

I have a method which is Async "upstream". I'm trying to follow best practice and go all-in qith async all the way up the stack.

Within a Controller action within MVC I predictably hit the deadlock issue If I rely on .Result().

Changing the Controller action to async seems to be the way to go, though the issue is that the async method is called multiple times within a lambda.

How can I await on a lamda that returns multiple results?

public async Task<JsonResult> GetLotsOfStuff() {  IEnumerable<ThingDetail> things= previouslyInitialisedCollection  .Select(async q => await GetDetailAboutTheThing(q.Id))); return Json(result, JsonRequestBehavior.AllowGet); } 

You can see I have tried making the lambda async, but this just gives a compiler exception:

Cannot convert source type

System.Collections.Generic.IEnumerable<System.Threading.Tasks.Task to target type `System.Collections.Generic.IEnumerable

Where am I going wrong here?

I have a method which is Async "upstream". I'm trying to follow best practice and go all-in qith async all the way up the stack.

Within a Controller action within MVC I predictably hit the deadlock issue If I rely on .Result().

Changing the Controller action to async seems to be the way to go, though the issue is that the async method is called multiple times within a lambda.

How can I await on a lamda that returns multiple results?

 public async Task<JsonResult> GetLotsOfStuff() { IEnumerable<ThingDetail> things= previouslyInitialisedCollection.Select(async q => await GetDetailAboutTheThing(q.Id))); return Json(result, JsonRequestBehavior.AllowGet); } 

You can see I have tried making the lambda async, but this just gives a compiler exception:

Cannot convert source type

System.Collections.Generic.IEnumerable<System.Threading.Tasks.Task>' to target type 'System.Collections.Generic.IEnumerable'

Where am I going wrong here?

I have a method which is Async "upstream". I'm trying to follow best practice and go all-in qith async all the way up the stack.

Within a Controller action within MVC I predictably hit the deadlock issue If I rely on .Result().

Changing the Controller action to async seems to be the way to go, though the issue is that the async method is called multiple times within a lambda.

How can I await on a lamda that returns multiple results?

 public async Task<JsonResult> GetLotsOfStuff() { IEnumerable<ThingDetail> things= previouslyInitialisedCollection.Select(async q => await GetDetailAboutTheThing(q.Id))); return Json(result, JsonRequestBehavior.AllowGet); } 

You can see I have tried making the lambda async, but this just gives a compiler exception:

Cannot convert source type

System.Collections.Generic.IEnumerable<System.Threading.Tasks.Task<ThingDetail>> to target type System.Collections.Generic.IEnumerable<ThingDetail>

Where am I going wrong here?