System.Threading by Microsoft

LazyInitializer

public static class LazyInitializer

public static T EnsureInitialized<T>(ref T target)

public static T EnsureInitialized<T>(ref T target, ref bool initialized, ref object syncLock)

public static T EnsureInitialized<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)

public static T EnsureInitialized<T>(ref T target, Func<T> valueFactory)