What is the default transaction isolation level for SQL Server with ADO.NET? I am using a default installation of SQL Server and just the normal System.Data.SqlClient classes.
READ COMMITTED is the default isolation level for the Microsoft SQL Server Database Engine.
Source:
Here is how it compares to other isolation levels:
The MSDN documentation for SqlConnection.BeginTransaction()
also states Read committed
... To reset the isolation level to the default (READ COMMITTED) ...