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For SQL Server, surely a lot in C/C++.<br />
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For .Net, some core libraries are also written in c/C++ but actually a lot too in both VB and C#.
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For SQL Server, surely a lot in C/C++.

For .Net, some core libraries are also written in c/C++ but actually a lot too in both VB and C#.

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my question is &nbsp;how .net CLR code is written , means what language is used to write .net core libraries , such as CLR<br />
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same is for Sql server
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my question is  how .net CLR code is written , means what language is used to write .net core libraries , such as CLR

same is for Sql server

what language is used to develop .net and sql server

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.