throw string exception c# code example

Example 1: c# throw new exception

static void CopyObject(SampleClass original)
{
    if (original == null)
    {
        throw new System.ArgumentException("Parameter cannot be null", "original");
    }
}

Example 2: trhow exception if is null c#

var firstName = name ?? throw new ArgumentException("Mandatory parameter", nameof(name),);