GitUI.FormSettings.DiffTool_Click C# (CSharp) Метод

        private void DiffTool_Click(object sender, EventArgs e)
        {
            GitCommands.GitCommands gitCommands = new GitCommands.GitCommands();

            if (string.IsNullOrEmpty(gitCommands.GetGlobalSetting("merge.tool")))
            {
                if (MessageBox.Show("There is no mergetool configured. Do you want to configure kdiff3 as your mergetool?" + Environment.NewLine + "Select no if you want to configure a different mergetool yourself.", "Mergetool", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    SolveKDiff();
                    GlobalMergeTool.Text = "kdiff3";
                }
                else
                {
                    tabControl1.SelectTab("GlobalSettingsPage");
                    return;
                }
            }

            if (gitCommands.GetGlobalSetting("merge.tool").Equals("kdiff3", StringComparison.CurrentCultureIgnoreCase))
            {
                SolveKDiffPath(gitCommands);
            }
            else
                if (gitCommands.GetGlobalSetting("merge.tool").Equals("p4merge", StringComparison.CurrentCultureIgnoreCase) ||
                    gitCommands.GetGlobalSetting("merge.tool").Equals("TortoiseMerge", StringComparison.CurrentCultureIgnoreCase))
                {
                    AutoConfigMergeToolcmd();
                    gitCommands.SetGlobalSetting("mergetool." + gitCommands.GetGlobalSetting("merge.tool") + ".cmd", MergeToolCmd.Text);
                }

            if (gitCommands.GetGlobalSetting("merge.tool").Equals("kdiff3", StringComparison.CurrentCultureIgnoreCase) && string.IsNullOrEmpty(gitCommands.GetGlobalSetting("mergetool.kdiff3.path")))
            {
                MessageBox.Show("Path to kdiff3 could not be found automatically." + Environment.NewLine + "Please make sure KDiff3 is installed or set path manually.");
                tabControl1.SelectTab("GlobalSettingsPage");
                return;
            }

            Rescan_Click(null, null);
        }