diff --git a/minisqlquery-master/src/MiniSqlQuery.Core/IPerformTask.cs b/minisqlquery-master/src/MiniSqlQuery.Core/IPerformTask.cs
new file mode 100644
index 0000000..bcf4beb
--- /dev/null
+++ b/minisqlquery-master/src/MiniSqlQuery.Core/IPerformTask.cs
@@ -0,0 +1,33 @@
+#region License
+
+// Copyright 2005-2019 Paul Kohler (https://github.com/paulkohler/minisqlquery). All rights reserved.
+// This source code is made available under the terms of the GNU Lesser General Public License v3.0
+// https://github.com/paulkohler/minisqlquery/blob/master/LICENSE
+
+#endregion
+
+
+namespace MiniSqlQuery.Core
+{
+ /// <summary>
+ /// Intended as a window level task such as executing a query (like applying ICommand to a window).
+ /// </summary>
+ public interface IPerformTask
+ {
+ /// <summary>
+ /// Gets a value indicating whether this instance is busy.
+ /// </summary>
+ /// <value>True if busy.</value>
+ bool IsBusy { get; }
+
+ /// <summary>
+ /// Cancels the current task.
+ /// </summary>
+ void CancelTask();
+
+ /// <summary>
+ /// Executes the current task.
+ /// </summary>
+ void ExecuteTask();
+ }
+}
\ No newline at end of file