Create Primary Key with Specific Name when Creating Table in SQL Server

There are basically two methods to do so:

Method 1:
CREATE TABLE [dbo].[TestTable](
[ID] [int] IDENTITY(1,1) NOT NULL,
[FirstName] [varchar](100) NULL)
GO
ALTER TABLE [dbo].[TestTable] ADD  CONSTRAINT [PK_TestTable] PRIMARY KEY CLUSTERED
([ID] ASC)
GO
  


Method 2:

CREATE TABLE [dbo].[TestTable](
[ID] [int] IDENTITY(1,1) NOT NULL,
[FirstName] [varchar](100) NULL,
CONSTRAINT [PK_TestTable] PRIMARY KEY CLUSTERED
([ID] ASC)
)
GO

However it would look very normal to all experienced developers, it can be still confusing to many.