C#

public int ArrayAutomatic() {
    int dim=1000;
    int[] numbers=new int[dim];
    ...
    int sum=SumArray(pNumbers, dim);
    return sum;
}

[DllImport("native.dll")]
unsafe public static extern int SumArray(int[] numbers, int count);

Public Function ArrayAutomatic() As Integer
    Dim dime As Integer = 1000
    Dim numbers(dime) As Integer
    ...
    Dim sum As Integer = SumArray(numbers, dime)
    Return sum
End Function

Declare Auto Function SumArray Lib "NativeC.dll" (ByVal numbers As Integer(), ByVal count As Integer) As Integer

extern "C" int __declspec(dllexport) __stdcall ret_arr(float returnArray[])
{
    returnArray[0] = 5;
    returnArray[1] =10;
    return 1;
}

[DllImport("CudaFft.dll", CallingConvention = CallingConvention.StdCall, EntryPoint = "ret_arr")]
public static extern int ret_arr(float[] retArray);

private void test()
{
    float[] retArray = new float[2];
    int ans = ret_arr(retArray);
}

SledgeHammer01 wrote:

reverse find the last .

SledgeHammer01 wrote:

.Split().Reverse().Skip(1).Reverse().Join()

string result = (from pos in new int[] { (str ?? string.Empty).LastIndexOf('.') } select (str ?? string.Empty).Substring(0, pos >= 0 ? pos : 0)).First();

AspDotNetDev wrote:

handles a null input string

string result = string.IsNullOrEmpty(str) ? str : (from pos in new int[] { str.LastIndexOf('.') } select str.Substring(0, pos >= 0 ? pos : str.Length)).First();