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Error The type 'ESRI.ArcGIS.Geometry.SpatialReferenceEnvironmentClass' has no constru

ShaningYu

I updated a .Net project from FW 3.5 to 4.0 (change the .Net FW target), I received a dozen of errors about No Constructors defined. One of them is below:
Error The type 'ESRI.ArcGIS.Geometry.SpatialReferenceEnvironmentClass' has no constructors defined
What should I do to solve this problem? Thanks.

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Accepted answers

NeilClemmons_GISinc

You can do that if you want but I've run into problems trying to use the 4.0 Framework with ArcObjects. The majority of our code is still at 9.3.1 but if you're using 10.0 you may not run into the same problems.

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BarbaraSchneider1

Thanks, this is what I was looking for

ShaningYu

Neil:
Thanks for your response. Actually, the problem I got is that posted at
http://forums.arcgis.com/threads/52656-Error-HRESULT-E_FAIL-has-been-returned-from-a-call-to-a-COM-component-...
Then I tried to change the FW from 3.5 to 4.0. The No-Constructor problem appears to be gone (see my continued thread). But the avobe error (HRESULT-E_FAIL) still exists. Thanks.
Shaning

NeilClemmons_GISinc

ShaningYu

Use the approach posted at:
http://gis.stackexchange.com/questions/5782/no-constructor-defined
1) In your project references, find the assembly where FeatureClassNameClass is (ie ESRI.ArcGIS.Geodatabase).
2) Right-click it and select "properties"
3) Change "Embed interop types" to "false"
The No-Constructor problem is gone.

NeilClemmons_GISinc

The .NET Framework 4.0 is not currently supported. You'll have to change the target framework back to 3.5.

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