Sets the start date of the request.
            
 Declaration Syntax
 Declaration Syntax| C# | 
[ObsoleteAttribute("The With methods are obsolete and will be removed in version 2 of the AWS SDK for .NET. See http://aws.amazon.com/sdkfornet/#version2 for more information.")] public SpotInstanceRequest WithValidFrom( string validFrom )
 Parameters
 Parameters- validFrom (String)
- Start date of the request. If this is a one-time request, the request remains active until all instances launch, the request expires, or the request is canceled. If the request is persistent, it remains active until it expires or is canceled.
 Return Value
 Return Valuethis instance