how can i convert class file to dll

Frist Step:-> In Microsoft visual studio file->new->project


Second Step:-> choose project type as c# and template will be class libraries


Third Step:-> the project name was classdll


Fourth Step:-> check the classdll location in your hard disk, there is one folder name was bin->debug-> here only your class file will convert into dll


Fifth Step:-> your file name was class1.cs


Sixth Step:-> first add your libraries whatever you want


Seventh Step:-> it show the error (missing assembly reference) you have to add the some libraries move to


Project->addreference->.net(tab) add your dll files…

Eight Step:->
Above like this
Nineth Step:-> you can placed your .cs coding in the class1 method

public class Class1
{
public long Add(long val1)//don’t give the static method
{
return val1;
}
}

This article-[Creating C# Class Library (DLL) Using Visual Studio .NET][^] might help you.

See this links

Video1[^]

Video2[^]

Thanks

it is better to use create class library to create DLL