I want to use below code in invoke code activity but I dont know how to do that

Imports System

Class GFG
    Public Shared Function isSafe(ByVal board As Integer(,), ByVal row As Integer, ByVal col As Integer, ByVal num As Integer) As Boolean
        For d As Integer = 0 To board.GetLength(0) - 1

            If board(row, d) = num Then
                Return False
            End If
        Next

        For r As Integer = 0 To board.GetLength(0) - 1

            If board(r, col) = num Then
                Return False
            End If
        Next

        Dim sqrt As Integer = CInt(Math.Sqrt(board.GetLength(0)))
        Dim boxRowStart As Integer = row - row Mod sqrt
        Dim boxColStart As Integer = col - col Mod sqrt

        For r As Integer = boxRowStart To boxRowStart + sqrt - 1

            For d As Integer = boxColStart To boxColStart + sqrt - 1

                If board(r, d) = num Then
                    Return False
                End If
            Next
        Next

        Return True
    End Function

    Public Shared Function solveSudoku(ByVal board As Integer(,), ByVal n As Integer) As Boolean
        Dim row As Integer = -1
        Dim col As Integer = -1
        Dim isEmpty As Boolean = True

        For i As Integer = 0 To n - 1

            For j As Integer = 0 To n - 1

                If board(i, j) = 0 Then
                    row = i
                    col = j
                    isEmpty = False
                    Exit For
                End If
            Next

            If Not isEmpty Then
                Exit For
            End If
        Next

        If isEmpty Then
            Return True
        End If

        For num As Integer = 1 To n

            If isSafe(board, row, col, num) Then
                board(row, col) = num

                If solveSudoku(board, n) Then
                    Return True
                Else
                    board(row, col) = 0
                End If
            End If
        Next

        Return False
    End Function

    Public Shared Sub print(ByVal board As Integer(,), ByVal N As Integer)
        For r As Integer = 0 To N - 1

            For d As Integer = 0 To N - 1
                Console.Write(board(r, d))
                Console.Write(" ")
            Next

            Console.Write(vbLf)

            If (r + 1) Mod CInt(Math.Sqrt(N)) = 0 Then
                Console.Write("")
            End If
        Next
    End Sub

    Public Shared Sub Main(ByVal args As String())
        Dim board As Integer(,) = New Integer(,) {
        {3, 0, 6, 5, 0, 8, 4, 0, 0},
        {5, 2, 0, 0, 0, 0, 0, 0, 0},
        {0, 8, 7, 0, 0, 0, 0, 3, 1},
        {0, 0, 3, 0, 1, 0, 0, 8, 0},
        {9, 0, 0, 8, 6, 3, 0, 0, 5},
        {0, 5, 0, 0, 9, 0, 6, 0, 0},
        {1, 3, 0, 0, 0, 0, 2, 5, 0},
        {0, 0, 0, 0, 0, 0, 0, 7, 4},
        {0, 0, 5, 2, 0, 6, 3, 0, 0}}
        Dim N As Integer = board.GetLength(0)

        If solveSudoku(board, N) Then
            print(board, N)
        Else
            Console.Write("No solution")
        End If
    End Sub
End Class

Hi @AmitB

I fixed your formatting for the entire block of code (see how it’s done by editing your post :slight_smile: )

Also, see this list of solved topics:
https://forum.uipath.com/search?q=invoke%20code%20status:solved

It should give you enough clues to solve the issue.