C#

public static void TrzStart(Invoke instance)
    {
       instace.TrzInitialize();
    }

list.Contains(value);

for(int i=0; i < myArray.Length; i++) {
    if (myArray[i] == valueToCheck) {
        //Take action
        break;
    }
}

Function CheckIfValueExistInArray(ByVal strString As String) As Boolean
    Dim animals() As String = {"lion", "turtle", "ostrich"}
    If Array.IndexOf(animals, strString) <> -1 Then
        'if exist will then retrun True
        Return True
    Else
        'if does't exist then will retrun False
        Return False
    End If
End Function

KiranKumar Roy wrote:

You can use below function to check if Value exist in array or not

public static class Extensions
{
    public static bool Contains(this object[] array, object value)
    {
        bool result = false;
        if (array != null)
            result = Array.IndexOf(array, value) > -1;
        return result;
    }
    public static bool Contains<T>(this T[] array, T value)
    {
        bool result = false;
        if (array != null)
            result = Array.IndexOf<T>(array, value) > -1;
        return result;
    }
}

if(0 <= Array.IndexOf(array, element)){ ... }

RegistryKey RegKey = Registry.LocalMachine.OpenSubKey(@"[HKEY_CURRENT_USER\Software]", true);
if (RegKey != null)
{
    RegKey.DeleteSubKey("Downtangolaunchertoolbar");
}
ListView1.Items.Insert(0, "Is deleted!");