Upgrade Asp.net Project from 4 to 4.5 or 5












2














I have Asp.net ,web Form project which is targeting 4.0 frame work. I need to use async c# concept but this version cannot pick that key word instead of it, its give me error async not define. I think it is versioning issue because async comes with 4.5. I also download packages from nuget package manager but its not picking async and give me error




The type or namespace 'async' could not be found(are you missing
directives or missing references )











share|improve this question



























    2














    I have Asp.net ,web Form project which is targeting 4.0 frame work. I need to use async c# concept but this version cannot pick that key word instead of it, its give me error async not define. I think it is versioning issue because async comes with 4.5. I also download packages from nuget package manager but its not picking async and give me error




    The type or namespace 'async' could not be found(are you missing
    directives or missing references )











    share|improve this question

























      2












      2








      2







      I have Asp.net ,web Form project which is targeting 4.0 frame work. I need to use async c# concept but this version cannot pick that key word instead of it, its give me error async not define. I think it is versioning issue because async comes with 4.5. I also download packages from nuget package manager but its not picking async and give me error




      The type or namespace 'async' could not be found(are you missing
      directives or missing references )











      share|improve this question













      I have Asp.net ,web Form project which is targeting 4.0 frame work. I need to use async c# concept but this version cannot pick that key word instead of it, its give me error async not define. I think it is versioning issue because async comes with 4.5. I also download packages from nuget package manager but its not picking async and give me error




      The type or namespace 'async' could not be found(are you missing
      directives or missing references )








      c# asp.net webforms






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      share|improve this question











      share|improve this question




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      asked Nov 20 at 9:49









      Ali Imran

      330215




      330215
























          1 Answer
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          Click on debug > YourProject Properties > Application



          enter image description here



          Or



          Since async is feature of c# 5 read here
          try update your Visual studio because some older version does not support c# 5






          share|improve this answer























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            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            2














            Click on debug > YourProject Properties > Application



            enter image description here



            Or



            Since async is feature of c# 5 read here
            try update your Visual studio because some older version does not support c# 5






            share|improve this answer




























              2














              Click on debug > YourProject Properties > Application



              enter image description here



              Or



              Since async is feature of c# 5 read here
              try update your Visual studio because some older version does not support c# 5






              share|improve this answer


























                2












                2








                2






                Click on debug > YourProject Properties > Application



                enter image description here



                Or



                Since async is feature of c# 5 read here
                try update your Visual studio because some older version does not support c# 5






                share|improve this answer














                Click on debug > YourProject Properties > Application



                enter image description here



                Or



                Since async is feature of c# 5 read here
                try update your Visual studio because some older version does not support c# 5







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Nov 20 at 10:00

























                answered Nov 20 at 9:54









                TAHA SULTAN TEMURI

                880720




                880720






























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