public static IList<EditingTemplate> GetTemplates( 
   MapMember mapMember
)

// retrieve editing templates associated with standalone tables in the active map.
await QueuedTask.Run(() =>
{
  //Get a particular table template
  var tableTemplate = activeMap.FindStandaloneTables("Address Points").FirstOrDefault()?.GetTemplate("Residences");
  //Get all the templates of a standalone table
  var ownersTableTemplates = activeMap.FindStandaloneTables("Owners").FirstOrDefault()?.GetTemplates();
  var statisticsTableTemplates = activeMap.GetStandaloneTablesAsFlattenedList().First(l => l.Name.Equals("Trading Statistics")).GetTemplates();
});

await QueuedTask.Run(() =>
{
  // Get all templates for the layer
  var templates = featureLayer.GetTemplates();
  if (templates.Count == 0)
    return;
  // Get the first template - alternatively get a specific template
  var template = templates.First();

  // Activate the default tool
  template.ActivateDefaultToolAsync();
});

{
  await QueuedTask.Run(() =>
  {
    // DAML ID of the tool to activate - for example "esri_editing_SketchTwoPointLineTool" Pro Tool or a custom tool
    string _editToolname = "esri_editing_SketchTwoPointLineTool";

    // Get all templates for the layer
    var templates = featureLayer.GetTemplates();
    if (templates.Count == 0)
      return;
    // Get the first template - alternatively get a specific template
    var template = templates.First();

    // Confirm the tool is available in the template
    if (template.ToolIDs.FirstOrDefault(_editToolname) == null)
      return;

    // Activate the tool
    template.ActivateToolAsync(_editToolname);
  });
}

{
  await QueuedTask.Run(() =>
  {
    // Get all templates for the layer
    var templates = featureLayer.GetTemplates();
    if (templates.Count == 0)
      return;
    // Get the first template - alternatively get a specific template
    var template = templates.First();

    // Activate the last selected/used tool for the template
    template.ActivateLastSelectedToolAsync();
  });
}

{
  await QueuedTask.Run(() =>
  {
    // Get all templates for the layer
    var templates = featureLayer.GetTemplates();
    if (templates.Count == 0)
      return;
    // Get the first template - alternatively get a specific template
    var template = templates.First();

    // Activate the template without changing the current tool
    template.ActivateAsync();
  });
}

await QueuedTask.Run(() =>
   {
     //hide all tools except line tool on a given feature layer
     var editTemplates = featureLayer.GetTemplates();
     var newCIMEditingTemplates = new List<CIMEditingTemplate>();

     foreach (var et in editTemplates)
     {
       //initialize template by activating default tool
       et.ActivateDefaultToolAsync();
       var cimEditTemplate = et.GetDefinition();
       //get the visible tools on this template
       var allTools = et.ToolIDs.ToList();
       //add the hidden tools on this template
       allTools.AddRange(cimEditTemplate.GetExcludedToolIDs().ToList());
       //hide all the tools then allow the line tool

       allTools.AddRange(cimEditTemplate.GetExcludedToolIDs().ToList());

       cimEditTemplate.SetExcludedToolIDs(allTools.ToArray());
       cimEditTemplate.AllowToolID("esri_editing_SketchLineTool");
       newCIMEditingTemplates.Add(cimEditTemplate);
     }
     //update the layer templates
     var layerDef = featureLayer.GetDefinition() as CIMFeatureLayer;
     // Set AutoGenerateFeatureTemplates to false for template changes to stick
     layerDef.AutoGenerateFeatureTemplates = false;
     layerDef.FeatureTemplates = newCIMEditingTemplates.ToArray();
     featureLayer.SetDefinition(layerDef);
   });