query to check if database is empty(No Tables in it )

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C#

Can anyone please help me to write the query: I need a c# query to check whether the database is empty or not.

I check first whether that database exists :

cmd.CommandText = "SELECT dbid FROM master.dbo.sysdatabases where name = '" + databaseName + "'";       
object DbID = cmd.ExecuteScalar();
if(DbID != null) //if database exists 
{
//CHECK IF DATABASE NOT EMPTY , if not empty ,display message already exists.                          
   cmd.CommandText = "select count(*) from INFORMATION_SCHEMA.TABLES";    
   //this is what i have tried but its giving same count for all the database even if there is a empty db.
   object TCount = cmd.ExecuteScalar();
   if(Convert.ToInt32(TCount) > 0) 
   //if database is not empty
   {
         //return result -database exists;
   }
}