The Three Methods Of Update MSSQL Table, Which Is The Best?

In order to update a MSSQL table, named [Table_1]. The procedure is:

(
@id int,
@Field0 nvarchar(1000) = NULL,
@Field1 nvarchar(1000) = NULL,
... ...
@Field9 nvarchar(1000) = NULL
)
Method 1:

UPDATE
    Table_1
SET
    Field0 =
        CASE
            WHEN @Field0 IS NULL THEN Field0
            ELSE @Field0
        END,
    Field1 =
        CASE
            WHEN @Field1 IS NULL THEN Field1
            ELSE @Field1
        END,
    ... ...
    Field9 =
        CASE
            WHEN @Field9 IS NULL THEN Field9
            ELSE @Field9
        END
WHERE
    id = @id

Method 2

IF @Field0 IS NOT NULL
    UPDATE
        Table_1
    SET
        Field0 = @Field0
    WHERE
        id = @id
    ... ...
    UPDATE
        Table_1
    SET
        Field9 = @Field9
    WHERE
        id = @id

Method 3:

DECLARE @SQL nvarchar(max)
DECLARE @NeedComma bit
SET @SQL = 'UPDATE Table_1 SET '
SET @NeedComma = 0
IF @Field0 IS NOT NULL
    BEGIN
        IF @NeedComma = 1
            SET @SQL = @SQL + ', '
        SET @SQL = @SQL + 'Field0 = @Field0'
        SET @NeedComma = 1
    END
... ...
IF @Field9 IS NOT NULL
    BEGIN
        IF @NeedComma = 1
            SET @SQL = @SQL + ', '
        SET @SQL = @SQL + 'Field9 = @Field9'
        SET @NeedComma = 1
    END
SET @SQL = @SQL + ' WHERE id = @id'
EXEC sp_executeSQL @SQL, N'@id int,@Field0 nvarchar(1000), ... ... , @Field9 nvarchar(1000)', @id = @id, @Field0 = @Field0, ... ... , @Field9 = @Field9

 

Which is the best? Thanks!