Add

.editorconfig

@@ -0,0 +1,18 @@
+[*.cs]
+indent_style = tab
+tab_widt = 8 
+csharp_new_line_before_open_brace = false
+csharp_new_line_before_else = false
+csharp_new_line_before_catch = false
+csharp_new_line_before_finally = false
+
+csharp_indent_case_contents = true
+csharp_indent_switch_labels = false
+csharp_indent_labels = flush_left
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_preserve_single_line_blocks = true
+dotnet_style_require_accessibility_modifiers = never
+csharp_style_var_when_type_is_apparent = true
+csharp_prefer_braces = false

Terminal.Gui/.editorconfig

@@ -0,0 +1,2 @@
+[*.cs]
+indent_style = tab