Xamarin IOS App Not Building

Srinath Mannam 291 Reputation points

I am trying to build the Xamarin IOS app from visual studio windows to an iPhone 9.

I get the following errors.



Can someone please about this?

A Microsoft open-source app platform for building Android and iOS apps with .NET and C#.
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Accepted answer
  1. Kyle Wang 5,526 Reputation points

    Hi SrinathMannam-4826,

    Welcome to our Microsoft Q&A platform!

    For the first error, there is no "ToHexString" method in NSData class. You can convert NSData to hexstring as follows.

    string ToHexString(NSData data)  
        byte[] by = data.ToArray();  
        StringBuilder hex = new StringBuilder(by.Length * 2);  
        foreach (byte b in by)  
            hex.AppendFormat("{0:x2}", b);  
        return hex.ToString();  

    For the error "CS0246", please check if you have add the right reference and using it in your code. More info you can refer to Compiler Error CS0246.

    As to the error "CS0234", similarly, you need to check if the namesapce has the correct references. For more info, refer to Compiler Error CS0234.

    To handle the error in the second image, you can try to clean the project and clear the related cache on Mac under the path ~/Library/Caches/Xamarin/mtbs.


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