Is there a simpler way to do this if statement in C#

Question

I have the following:

if (model.PartitionKey.Substring(2, 2) == \"05\" || 
    model.PartitionKey.Substring(2, 2) == \"06\")

I have more like t

Answer 1

var keyString = model.PartitionKey.Substring(2, 2);
if (keyString == "05" || keyString == "06")
{
    // ...
}