Get the project file path

To get the project file path, use the Path property of the IProject object.

public void OutputProjectFilePath(ICommandContext c, ICommandParams p) 
{ 
//Get the project file path 
var projectFilePath = c.App.Workspace.CurrentProject.Path; 
c.App.Output.WriteLine("sample", projectFilePath); 
} 

To get the project file directory, use the GetDirectoryName() method of System.IO.Path.

//Get the project file path 
var projectFilePath = c.App.Workspace.CurrentProject.Path; 

//Get the project file directory 
var dir = System.IO.Path.GetDirectoryName(projectFilePath); 

App.Output.WriteLine("sample", $"Directory : {dir}");