public void PerformMerge()
{
var allBuildingBlockToMergeMapping = _allBuildingBlockMappings.Where(selectionIsDefined).ToList();
var buildingBlocksToMerge = allBuildingBlockToMergeMapping.Select(x => x.BuildingBlockToMerge).ToList();
var projectBuildingBlocks = allBuildingBlockToMergeMapping.Select(x => realBuildingBlockFrom(x.ProjectBuildingBlock)).ToList();
try
{
AddCommand(_mergeTask.MergeBuildingBlocks(buildingBlocksToMerge, projectBuildingBlocks, _cancellationTokenSource.Token));
}
catch (OperationCanceledException)
{
}
}
