C# と VB.NET の質問掲示板

下の　�@ の部分に「エラー　BC30179　structure 'datt' と structure 'datt' が 
namespace 'WindowsApp1' で競合しています」が出てしまい困っています。
よろしくお願いします。

Module Module1
    Public Sub MySub(ByVal dat() As datt)
        ' ここに共通の処理コードを書く
    End Sub
End Module


'Form1の構造体を宣言
Public Structure datt　　'�@　
    Dim da1 As Single
    Dim da2 As Single
End Structure

Public Class Form1
    Dim dat(10) As datt

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Call MySub(dat)
    End Sub
End Class


'Form2の構造体を宣言
Public Structure datt
    Dim da1 As Single
    Dim da2 As Single
End Structure

Public Class Form2
    Dim dat(10) As datt

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Call MySub(dat)
    End Sub
End Class