Insert NUll in value datatype like int,float in C#

Some times we need to make some data type to null. Like
in some cases like stored procedure in database.

We can do it in C# very easily. by just putting ?sign in'
the definition like below:

int? a;

that's it! you have created a value data type with null
database. If you don't supply a value to the int a then
it will remain null.

You can use this for any value data type like short,single,
double,long,decimal etc.

Happy Programming...

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