C#

public static void SuperCoolMethod(params int[] list) 
{
 // code here
}

...

SuperCoolMethod(1,2,3,4,5);

public void SetParameter(string name, object value)
{
    //Access the specified parameter from the parameters collection        
    CrystalDecisions.CrystalReports.Engine.ParameterFieldDefinition parameter = _reportDocument.DataDefinition.ParameterFields[name];
     // Now get the current value for the parameter and clear them    
    CrystalDecisions.Shared.ParameterValues currentValues = parameter.CurrentValues;    currentValues.Clear();
     // Create a value object for Crystal reports and assign the specified value.
    CrystalDecisions.Shared.ParameterDiscreteValue newValue = new CrystalDecisions.Shared.ParameterDiscreteValue();
    newValue.Value = value;
     // Now add the new value to the values collection and apply the
     // collection to the report.
    currentValues.Add(newValue);
    parameter.ApplyCurrentValues(currentValues);
}