c# - How to get String.Format not to parse {0} -

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i writing code generation tool have lines like

stringbuilder sp = new stringbuilder(); sp.appendformat("        public {0}textcolumn()\n", classname); sp.appendline("        {" sp.appendline("            column = new datagridviewtextboxcolumn();"); sp.appendformat("            column.datapropertyname = \"{0}\";\n", columnname);

however issue having when run in line this.

sp.appendformat("return string.format(\"{0} = '{0}'\", cmblist.selectedvalue);", columnname);

i want first {0} turn in whatever value of columnname want seccond {0} left alone internal string.format process correctly.

how do this?

use double curly braces:

string result = string.format("{{ignored}} {{123}} {0}", 543);

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