i need a convert vba code to c#

I don't think there's a provided way to migrate VBA to .NET, but there are conversion tools online that might help as a syntactical reference for parts of the code. This approach will be cumbersome, but it might still be easier than doing it all by hand.

Here's an article that discusses migrating VBA to VB.NET:

Converters

Here's a VB.NET to C# converter:

And here's another one: