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HttpClient not supporting PostAsJsonAsync method C#

I am trying to call a web API from my web application. I am using .Net 4.5 and while writing the code I am getting the error HttpClient does not contain a definition PostAsJsonAsync method. ...
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Given a number, find the next higher number which has the exact same set of digits as the original n

...in the correct place in O(n)). An example will make this more clear: 123456784987654321 start with a number 123456784 987654321 ^the first place from the right where the left-digit is less than the right Digit "x" is 4 123456784 987654321 ^find the smallest dig...
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How do you extract a column from a multi-dimensional array?

... 234 >>> import numpy as np >>> A = np.array([[1,2,3,4],[5,6,7,8]]) >>> A...
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Get the time difference between two datetimes

... This approach will work ONLY when the total duration is less than 24 hours: var now = "04/09/2013 15:00:00"; var then = "04/09/2013 14:20:30"; moment.utc(moment(now,"DD/MM/YYYY HH:mm:ss").diff(moment(then,"DD/MM/YYYY HH:mm:ss"))).format("HH:mm:ss") // outputs: "00:39:30" If you have 24...
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Strangest language feature

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Evaluating string “3*(4+2)” yield int 18 [duplicate]

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How to change UIPickerView height

... 54 It seems obvious that Apple doesn't particularly invite mucking with the default height of the U...
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How to replace an entire line in a text file by line number

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How do I get bit-by-bit data from an integer value in C?

... | edited Jan 9 '16 at 4:21 Ashish Ahuja 4,70099 gold badges4343 silver badges6161 bronze badges answ...
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How can I get my Twitter Bootstrap buttons to right align?

...rap.com/docs/3.3/css/#helper-classes > Helper classes. For Bootstrap 4, see: https://getbootstrap.com/docs/4.0/utilities/float/#responsive The pull-right command was removed and replaced with float-right or in general to float-{sm,md,lg,xl}-{left,right,none} ...